diff --git a/api/schema/classroom_compliance.sql b/api/schema/classroom_compliance.sql
index 8e8be60..b1486c6 100644
--- a/api/schema/classroom_compliance.sql
+++ b/api/schema/classroom_compliance.sql
@@ -19,7 +19,8 @@ CREATE TABLE classroom_compliance_entry (
     id INTEGER PRIMARY KEY,
     class_id INTEGER NOT NULL REFERENCES classroom_compliance_class(id)
         ON UPDATE CASCADE ON DELETE CASCADE,
-    student_id INTEGER NOT NULL REFERENCES classroom_compliance_student(id),
+    student_id INTEGER NOT NULL REFERENCES classroom_compliance_student(id)
+        ON UPDATE CASCADE ON DELETE CASCADE,
     date TEXT NOT NULL,
     created_at INTEGER NOT NULL,
     absent INTEGER NOT NULL DEFAULT 0
diff --git a/api/source/api_modules/classroom_compliance.d b/api/source/api_modules/classroom_compliance.d
index 733d8cd..32f0d0c 100644
--- a/api/source/api_modules/classroom_compliance.d
+++ b/api/source/api_modules/classroom_compliance.d
@@ -6,6 +6,10 @@ import d2sqlite3;
 import slf4d;
 import std.typecons : Nullable;
 import std.datetime;
+import std.format;
+import std.json;
+import std.algorithm;
+import std.array;
 
 import db;
 import data_utils;
@@ -58,11 +62,12 @@ void registerApiEndpoints(PathHandler handler) {
     handler.addMapping(Method.POST, CLASS_PATH ~ "/students", &createStudent);
     handler.addMapping(Method.GET, CLASS_PATH ~ "/students", &getStudents);
     const STUDENT_PATH = CLASS_PATH ~ "/students/:studentId:ulong";
+    handler.addMapping(Method.GET, STUDENT_PATH, &getStudent);
     handler.addMapping(Method.PUT, STUDENT_PATH, &updateStudent);
     handler.addMapping(Method.DELETE, STUDENT_PATH, &deleteStudent);
 
-    handler.addMapping(Method.POST, CLASS_PATH ~ "/entries", &createEntry);
     handler.addMapping(Method.GET, CLASS_PATH ~ "/entries", &getEntries);
+    handler.addMapping(Method.POST, CLASS_PATH ~ "/entries", &saveEntries);
 }
 
 void createClass(ref HttpRequestContext ctx) {
@@ -82,7 +87,7 @@ void createClass(ref HttpRequestContext ctx) {
     );
     if (classNumberExists) {
         ctx.response.status = HttpStatus.BAD_REQUEST;
-        ctx.response.writeBodyString("There is already a class with this number, for this school year.");
+        ctx.response.writeBodyString("There is already a class with this number, for the same school year.");
         return;
     }
     auto stmt = db.prepare("INSERT INTO classroom_compliance_class (number, school_year, user_id) VALUES (?, ?, ?)");
@@ -139,6 +144,7 @@ void createStudent(ref HttpRequestContext ctx) {
     struct StudentPayload {
         string name;
         ushort deskNumber;
+        bool removed;
     }
     auto payload = readJsonPayload!(StudentPayload)(ctx);
     auto db = getDb();
@@ -150,7 +156,7 @@ void createStudent(ref HttpRequestContext ctx) {
     );
     if (studentExists) {
         ctx.response.status = HttpStatus.BAD_REQUEST;
-        ctx.response.writeBodyString("Student with that name already exists.");
+        ctx.response.writeBodyString("A student with that name already exists in this class.");
         return;
     }
     bool deskAlreadyOccupied = payload.deskNumber != 0 && canFind(
@@ -161,11 +167,11 @@ void createStudent(ref HttpRequestContext ctx) {
     );
     if (deskAlreadyOccupied) {
         ctx.response.status = HttpStatus.BAD_REQUEST;
-        ctx.response.writeBodyString("There is already a student assigned to that desk.");
+        ctx.response.writeBodyString("There is already a student assigned to that desk number.");
     }
     db.execute(
-        "INSERT INTO classroom_compliance_student (name, class_id, desk_number) VALUES (?, ?)",
-        payload.name, cls.id, payload.deskNumber
+        "INSERT INTO classroom_compliance_student (name, class_id, desk_number, removed) VALUES (?, ?, ?, ?)",
+        payload.name, cls.id, payload.deskNumber, payload.removed
     );
     ulong studentId = db.lastInsertRowid();
     auto student = findOne!(ClassroomComplianceStudent)(
@@ -188,22 +194,30 @@ void getStudents(ref HttpRequestContext ctx) {
     writeJsonBody(ctx, students);
 }
 
+void getStudent(ref HttpRequestContext ctx) {
+    User user = getUserOrThrow(ctx);
+    auto student = getStudentOrThrow(ctx, user);
+    writeJsonBody(ctx, student);
+}
+
 void updateStudent(ref HttpRequestContext ctx) {
     User user = getUserOrThrow(ctx);
     auto student = getStudentOrThrow(ctx, user);
     struct StudentUpdatePayload {
         string name;
         ushort deskNumber;
+        bool removed;
     }
     auto payload = readJsonPayload!(StudentUpdatePayload)(ctx);
     // If there is nothing to update, quit.
     if (
         payload.name == student.name
         && payload.deskNumber == student.deskNumber
+        && payload.removed == student.removed
     ) return;
     // Check that the new name doesn't already exist.
     auto db = getDb();
-    bool newNameExists = canFind(
+    bool newNameExists = payload.name != student.name && canFind(
         db,
         "SELECT id FROM classroom_compliance_student WHERE name = ? AND class_id = ?",
         payload.name,
@@ -211,11 +225,11 @@ void updateStudent(ref HttpRequestContext ctx) {
     );
     if (newNameExists) {
         ctx.response.status = HttpStatus.BAD_REQUEST;
-        ctx.response.writeBodyString("Student with that name already exists.");
+        ctx.response.writeBodyString("A student with that name already exists in this class.");
         return;
     }
     // Check that if a new desk number is assigned, that it's not already assigned to anyone else.
-    bool newDeskOccupied = payload.deskNumber != 0 && canFind(
+    bool newDeskOccupied = payload.deskNumber != 0 && payload.deskNumber != student.deskNumber && canFind(
         db,
         "SELECT id FROM classroom_compliance_student WHERE class_id = ? AND desk_number = ?",
         student.classId,
@@ -227,9 +241,10 @@ void updateStudent(ref HttpRequestContext ctx) {
         return;
     }
     db.execute(
-        "UPDATE classroom_compliance_student SET name = ?, desk_number = ? WHERE id = ?",
+        "UPDATE classroom_compliance_student SET name = ?, desk_number = ?, removed = ? WHERE id = ?",
         payload.name,
         payload.deskNumber,
+        payload.removed,
         student.id
     );
     auto updatedStudent = findOne!(ClassroomComplianceStudent)(
@@ -270,75 +285,6 @@ ClassroomComplianceStudent getStudentOrThrow(ref HttpRequestContext ctx, in User
     ).orElseThrow(() => new HttpStatusException(HttpStatus.NOT_FOUND));
 }
 
-void createEntry(ref HttpRequestContext ctx) {
-    User user = getUserOrThrow(ctx);
-    auto cls = getClassOrThrow(ctx, user);
-    struct EntryPhonePayload {
-        bool compliant;
-    }
-    struct EntryBehaviorPayload {
-        int rating;
-        Nullable!string comment;
-    }
-    struct EntryPayload {
-        ulong studentId;
-        string date;
-        bool absent;
-        Nullable!EntryPhonePayload phoneCompliance;
-        Nullable!EntryBehaviorPayload behaviorCompliance;
-    }
-    auto payload = readJsonPayload!(EntryPayload)(ctx);
-    auto db = getDb();
-    bool entryAlreadyExists = canFind(
-        db,
-        "SELECT id FROM classroom_compliance_entry WHERE class_id = ? AND student_id = ? AND date = ?",
-        cls.id,
-        payload.studentId,
-        payload.date
-    );
-    if (entryAlreadyExists) {
-        ctx.response.status = HttpStatus.BAD_REQUEST;
-        ctx.response.writeBodyString("An entry already exists for this student and date.");
-        return;
-    }
-    // Insert the entry and its attached entities in a transaction.
-    db.begin();
-    try {
-        db.execute(
-            "INSERT INTO classroom_compliance_entry (class_id, student_id, date, created_at, absent)
-            VALUES (?, ?, ?, ?, ?)",
-            cls.id,
-            payload.studentId,
-            payload.date,
-            getUnixTimestampMillis(),
-            payload.absent
-        );
-        ulong entryId = db.lastInsertRowid();
-        if (!payload.absent && !payload.phoneCompliance.isNull) {
-            db.execute(
-                "INSERT INTO classroom_compliance_entry_phone (entry_id, compliant) VALUES (?, ?)",
-                entryId,
-                payload.phoneCompliance.get().compliant
-            );
-        }
-        if (!payload.absent && !payload.behaviorCompliance.isNull) {
-            Nullable!string comment = payload.behaviorCompliance.get().comment;
-            if (!comment.isNull && (comment.get() is null || comment.get().length == 0)) {
-                comment.nullify();
-            }
-            db.execute(
-                "INSERT INTO classroom_compliance_entry_behavior (entry_id, rating, comment) VALUES (?, ?, ?)",
-                entryId,
-                payload.behaviorCompliance.get().rating,
-                comment
-            );
-        }
-        db.commit();
-    } catch (Exception e) {
-        db.rollback();
-    }
-}
-
 void getEntries(ref HttpRequestContext ctx) {
     User user = getUserOrThrow(ctx);
     auto cls = getClassOrThrow(ctx, user);
@@ -367,6 +313,22 @@ void getEntries(ref HttpRequestContext ctx) {
     infoF!"Getting entries from %s to %s"(fromDate.toISOExtString(), toDate.toISOExtString());
 
     auto db = getDb();
+
+    ClassroomComplianceStudent[] students = findAll!(ClassroomComplianceStudent)(
+        db,
+        "SELECT * FROM classroom_compliance_student WHERE class_id = ? ORDER BY name ASC",
+        cls.id
+    );
+    JSONValue[] studentObjects = students.map!((s) {
+        JSONValue obj = JSONValue.emptyObject;
+        obj.object["id"] = JSONValue(s.id);
+        obj.object["deskNumber"] = JSONValue(s.deskNumber);
+        obj.object["name"] = JSONValue(s.name);
+        obj.object["removed"] = JSONValue(s.removed);
+        obj.object["entries"] = JSONValue.emptyObject;
+        return obj;
+    }).array;
+
     const query = "
     SELECT
         entry.id,
@@ -392,32 +354,16 @@ void getEntries(ref HttpRequestContext ctx) {
         AND entry.date >= ?
         AND entry.date <= ?
     ORDER BY
-        entry.date ASC,
-        student.desk_number ASC,
-        student.name ASC
+        student.id ASC,
+        entry.date ASC
     ";
     ResultRange result = db.execute(query, cls.id, fromDate.toISOExtString(), toDate.toISOExtString());
     // Serialize the results into a custom-formatted response object.
-    import std.json;
-    JSONValue response = JSONValue.emptyObject;
-    JSONValue[ulong] studentObjects;
     foreach (row; result) {
-        ulong studentId = row.peek!ulong(4);
-        if (studentId !in studentObjects) {
-            JSONValue student = JSONValue.emptyObject;
-            student.object["id"] = JSONValue(row.peek!ulong(4));
-            student.object["name"] = JSONValue(row.peek!string(5));
-            student.object["deskNumber"] = JSONValue(row.peek!ushort(6));
-            student.object["removed"] = JSONValue(row.peek!bool(7));
-            student.object["entries"] = JSONValue.emptyObject;
-            studentObjects[studentId] = student;
-        }
-        JSONValue studentObj = studentObjects[studentId];
-
         JSONValue entry = JSONValue.emptyObject;
         entry.object["id"] = JSONValue(row.peek!ulong(0));
         entry.object["date"] = JSONValue(row.peek!string(1));
-        entry.object["createdAt"] = JSONValue(row.peek!string(2));
+        entry.object["createdAt"] = JSONValue(row.peek!ulong(2));
         entry.object["absent"] = JSONValue(row.peek!bool(3));
 
         JSONValue phone = JSONValue(null);
@@ -431,12 +377,27 @@ void getEntries(ref HttpRequestContext ctx) {
         }
         entry.object["phone"] = phone;
         entry.object["behavior"] = behavior;
-        
         string dateStr = entry.object["date"].str();
-        studentObj.object["entries"].object[dateStr] = entry;
+
+        // Find the student object this entry belongs to, then add it to their list.
+        ulong studentId = row.peek!ulong(4);
+        bool studentFound = false;
+        foreach (idx, student; students) {
+            if (student.id == studentId) {
+                studentObjects[idx].object["entries"].object[dateStr] = entry;
+                studentFound = true;
+                break;
+            }
+        }
+        if (!studentFound) {
+            throw new Exception("Failed to find student.");
+        }
     }
+
+    JSONValue response = JSONValue.emptyObject;
     // Provide the list of dates that we're providing data for, to make it easier for the frontend.
     response.object["dates"] = JSONValue.emptyArray;
+    
     // Also fill in "null" for any students that don't have an entry on one of these days.
     Date d = fromDate;
     while (d <= toDate) {
@@ -449,8 +410,180 @@ void getEntries(ref HttpRequestContext ctx) {
         }
         d += days(1);
     }
-    response.object["students"] = JSONValue(studentObjects.values);
+    response.object["students"] = JSONValue(studentObjects);
 
     string jsonStr = response.toJSON();
     ctx.response.writeBodyString(jsonStr, "application/json");
 }
+
+void saveEntries(ref HttpRequestContext ctx) {
+    User user = getUserOrThrow(ctx);
+    auto cls = getClassOrThrow(ctx, user);
+    JSONValue bodyContent = ctx.request.readBodyAsJson();
+    auto db = getDb();
+    db.begin();
+    foreach (JSONValue studentObj; bodyContent.object["students"].array) {
+        ulong studentId = studentObj.object["id"].integer();
+        JSONValue entries = studentObj.object["entries"];
+        foreach (string dateStr, JSONValue entry; entries.object) {
+            if (entry.isNull) {
+                db.execute(
+                    "DELETE FROM classroom_compliance_entry WHERE class_id = ? AND student_id = ? AND date = ?",
+                    cls.id,
+                    studentId,
+                    dateStr
+                );
+                infoF!"Deleted entry for student %s on %s"(studentId, dateStr);
+                continue;
+            }
+
+            Optional!ClassroomComplianceEntry existingEntry = findOne!(ClassroomComplianceEntry)(
+                db,
+                "SELECT * FROM classroom_compliance_entry WHERE class_id = ? AND student_id = ? AND date = ?",
+                cls.id, studentId, dateStr
+            );
+
+            ulong entryId = entry.object["id"].integer();
+            bool creatingNewEntry = entryId == 0;
+
+            if (creatingNewEntry) {
+                if (!existingEntry.isNull) {
+                    ctx.response.status = HttpStatus.BAD_REQUEST;
+                    ctx.response.writeBodyString(
+                        format!"Cannot create a new entry for student %d on %s when one already exists."(
+                            studentId,
+                            dateStr
+                        )
+                    );
+                    return;
+                }
+
+                insertNewEntry(db, cls.id, studentId, dateStr, entry);
+            } else {
+                if (existingEntry.isNull) {
+                    ctx.response.status = HttpStatus.BAD_REQUEST;
+                    ctx.response.writeBodyString(
+                        format!"Cannot update entry %d because it doesn't exist."(
+                            entryId
+                        )
+                    );
+                    return;
+                }
+                updateEntry(db, cls.id, studentId, dateStr, entryId, entry);
+            }
+        }
+    }
+    db.commit();
+}
+
+private void insertNewEntry(
+    ref Database db,
+    ulong classId,
+    ulong studentId,
+    string dateStr,
+    JSONValue payload
+) {
+    ulong createdAt = getUnixTimestampMillis();
+    bool absent = payload.object["absent"].boolean;
+    db.execute(
+        "INSERT INTO classroom_compliance_entry
+        (class_id, student_id, date, created_at, absent)
+        VALUES (?, ?, ?, ?, ?)",
+        classId, studentId, dateStr, createdAt, absent
+    );
+    if (!absent) {
+        ulong entryId = db.lastInsertRowid();
+        if ("phone" !in payload.object || payload.object["phone"].type != JSONType.object) {
+            throw new HttpStatusException(HttpStatus.BAD_REQUEST, "Missing phone data.");
+        }
+        if ("behavior" !in payload.object || payload.object["behavior"].type != JSONType.object) {
+            throw new HttpStatusException(HttpStatus.BAD_REQUEST, "Missing behavior data.");
+        }
+        bool phoneCompliance = payload.object["phone"].object["compliant"].boolean;
+        db.execute(
+            "INSERT INTO classroom_compliance_entry_phone (entry_id, compliant)
+            VALUES (?, ?)",
+            entryId, phoneCompliance
+        );
+        ubyte behaviorRating = cast(ubyte) payload.object["behavior"].object["rating"].integer;
+        db.execute(
+            "INSERT INTO classroom_compliance_entry_behavior (entry_id, rating, comment)
+            VALUES (?, ?, ?)",
+            entryId, behaviorRating, ""
+        );
+    }
+    infoF!"Created new entry for student %d: %s"(studentId, payload);
+}
+
+private void updateEntry(
+    ref Database db,
+    ulong classId,
+    ulong studentId,
+    string dateStr,
+    ulong entryId,
+    JSONValue obj
+) {
+    bool absent = obj.object["absent"].boolean;
+    db.execute(
+        "UPDATE classroom_compliance_entry
+        SET absent = ?
+        WHERE class_id = ? AND student_id = ? AND date = ? AND id = ?",
+        absent, classId, studentId, dateStr, entryId
+    );
+    if (absent) {
+        db.execute(
+            "DELETE FROM classroom_compliance_entry_phone WHERE entry_id = ?",
+            entryId
+        );
+        db.execute(
+            "DELETE FROM classroom_compliance_entry_behavior WHERE entry_id = ?",
+            entryId
+        );
+    } else {
+        bool phoneCompliant = obj.object["phone"].object["compliant"].boolean;
+        bool phoneDataExists = canFind(
+            db,
+            "SELECT * FROM classroom_compliance_entry_phone WHERE entry_id = ?",
+            entryId
+        );
+
+        if (phoneDataExists) {
+            db.execute(
+                "UPDATE classroom_compliance_entry_phone
+                SET compliant = ?
+                WHERE entry_id = ?",
+                phoneCompliant,
+                entryId
+            );
+        } else {
+            db.execute(
+                "INSERT INTO classroom_compliance_entry_phone (entry_id, compliant)
+                VALUES (?, ?)",
+                entryId, phoneCompliant
+            );
+        }
+
+        ubyte behaviorRating = cast(ubyte) obj.object["behavior"].object["rating"].integer;
+        bool behaviorDataExists = canFind(
+            db,
+            "SELECT * FROM classroom_compliance_entry_behavior WHERE entry_id = ?",
+            entryId
+        );
+        if (behaviorDataExists) {
+            db.execute(
+                "UPDATE classroom_compliance_entry_behavior
+                SET rating = ?
+                WHERE entry_id = ?",
+                behaviorRating,
+                entryId
+            );
+        } else {
+            db.execute(
+                "INSERT INTO classroom_compliance_entry_behavior (entry_id, rating)
+                VALUES (?, ?)",
+                entryId, behaviorRating
+            );
+        }
+    }
+    infoF!"Updated entry %d"(entryId);
+}
diff --git a/app/src/App.vue b/app/src/App.vue
index 828fb3d..fb64af3 100644
--- a/app/src/App.vue
+++ b/app/src/App.vue
@@ -1,8 +1,15 @@
 <script setup lang="ts">
-import { RouterLink, RouterView } from 'vue-router'
+import { RouterLink, RouterView, useRouter } from 'vue-router'
 import { useAuthStore } from './stores/auth'
+import AlertDialog from './components/AlertDialog.vue'
 
 const authStore = useAuthStore()
+const router = useRouter()
+
+async function logOut() {
+  authStore.logOut()
+  await router.replace('/')
+}
 </script>
 
 <template>
@@ -15,7 +22,7 @@ const authStore = useAuthStore()
         <span v-if="authStore.state">
           Welcome, <span v-text="authStore.state.username"></span>
         </span>
-        <button type="button" @click="authStore.logOut" v-if="authStore.state">Log out</button>
+        <button type="button" @click="logOut" v-if="authStore.state">Log out</button>
       </nav>
       <nav v-if="authStore.state">
         Apps:
@@ -26,6 +33,9 @@ const authStore = useAuthStore()
   </header>
 
   <RouterView />
+
+  <!-- Global dialog elements are included here below, hidden by default. -->
+  <AlertDialog />
 </template>
 
 <style scoped></style>
diff --git a/app/src/alerts.ts b/app/src/alerts.ts
new file mode 100644
index 0000000..46b0502
--- /dev/null
+++ b/app/src/alerts.ts
@@ -0,0 +1,11 @@
+export function showAlert(msg: string): Promise<void> {
+  const dialog = document.getElementById('alert-dialog') as HTMLDialogElement
+  const messageBox = document.getElementById('alert-dialog-message') as HTMLParagraphElement
+  const closeButton = document.getElementById('alert-dialog-close-button') as HTMLButtonElement
+  closeButton.addEventListener('click', () => dialog.close())
+  messageBox.innerText = msg
+  dialog.showModal()
+  return new Promise((resolve) => {
+    dialog.addEventListener('close', () => resolve())
+  })
+}
diff --git a/app/src/api/auth.ts b/app/src/api/auth.ts
index 3bab7de..d11eca6 100644
--- a/app/src/api/auth.ts
+++ b/app/src/api/auth.ts
@@ -1,3 +1,5 @@
+import { APIClient, APIResponse, type AuthStoreType } from './base'
+
 const BASE_URL = import.meta.env.VITE_API_URL + '/auth'
 
 export interface User {
@@ -8,22 +10,18 @@ export interface User {
   isAdmin: boolean
 }
 
-export function getAuthHeaders(basicAuth: string) {
-  return {
-    Authorization: 'Basic ' + basicAuth,
+export class AuthenticationAPIClient extends APIClient {
+  constructor(authStore: AuthStoreType) {
+    super(BASE_URL, authStore)
   }
-}
 
-export async function login(username: string, password: string): Promise<User | null> {
-  const basicAuth = btoa(username + ':' + password)
-  const response = await fetch(BASE_URL + '/login', {
-    method: 'POST',
-    headers: {
-      Authorization: 'Basic ' + basicAuth,
-    },
-  })
-  if (!response.ok) {
-    return null
+  login(username: string, password: string): APIResponse<User> {
+    const promise = fetch(this.baseUrl + '/login', {
+      method: 'POST',
+      headers: {
+        Authorization: 'Basic ' + btoa(username + ':' + password),
+      },
+    })
+    return new APIResponse(this.handleAPIResponse(promise))
   }
-  return (await response.json()) as User
 }
diff --git a/app/src/api/base.ts b/app/src/api/base.ts
new file mode 100644
index 0000000..f94dd28
--- /dev/null
+++ b/app/src/api/base.ts
@@ -0,0 +1,134 @@
+import { showAlert } from '@/alerts'
+import { useAuthStore } from '@/stores/auth'
+
+export abstract class APIError {
+  message: string
+  constructor(message: string) {
+    this.message = message
+  }
+}
+
+export class BadRequestError extends APIError {}
+
+export class InternalServerError extends APIError {}
+
+export class NetworkError extends APIError {}
+
+export class AuthenticationError extends APIError {}
+
+/**
+ * Represents a generic API response that that will be completed in the future
+ * using a given promise, which resolves either to a specified response type,
+ * or an API Error type.
+ */
+export class APIResponse<T> {
+  result: Promise<T | APIError>
+  constructor(result: Promise<T | APIError>) {
+    this.result = result
+  }
+
+  async handleErrorsWithAlert(): Promise<T | null> {
+    const value = await this.result
+    if (value instanceof APIError) {
+      await showAlert(value.message)
+      return null
+    }
+    return value
+  }
+
+  async getOrThrow(): Promise<T> {
+    const value = await this.result
+    if (value instanceof APIError) throw value
+    return value
+  }
+}
+
+export type AuthStoreType = ReturnType<typeof useAuthStore>
+
+export abstract class APIClient {
+  readonly baseUrl: string
+  authStore: AuthStoreType
+  constructor(baseUrl: string, authStore: AuthStoreType) {
+    this.baseUrl = baseUrl
+    this.authStore = authStore
+  }
+
+  protected get<T>(url: string): APIResponse<T> {
+    const promise = fetch(this.baseUrl + url, { headers: this.getAuthHeaders() })
+    return new APIResponse(this.handleAPIResponse(promise))
+  }
+
+  protected post<T, B>(url: string, body: B): APIResponse<T> {
+    const promise = fetch(this.baseUrl + url, {
+      headers: this.getAuthHeaders(),
+      method: 'POST',
+      body: JSON.stringify(body),
+    })
+    return new APIResponse(this.handleAPIResponse(promise))
+  }
+
+  protected postWithNoExpectedResponse<B>(url: string, body: B): APIResponse<void> {
+    const promise = fetch(this.baseUrl + url, {
+      headers: this.getAuthHeaders(),
+      method: 'POST',
+      body: JSON.stringify(body),
+    })
+    return new APIResponse(this.handleAPIResponseWithNoBody(promise))
+  }
+
+  protected put<T, B>(url: string, body: B): APIResponse<T> {
+    const promise = fetch(this.baseUrl + url, {
+      headers: this.getAuthHeaders(),
+      method: 'PUT',
+      body: JSON.stringify(body),
+    })
+    return new APIResponse(this.handleAPIResponse(promise))
+  }
+
+  protected delete(url: string): APIResponse<void> {
+    const promise = fetch(this.baseUrl + url, {
+      headers: this.getAuthHeaders(),
+      method: 'DELETE',
+    })
+    return new APIResponse(this.handleAPIResponseWithNoBody(promise))
+  }
+
+  protected getAuthHeaders() {
+    return {
+      Authorization: 'Basic ' + this.authStore.getBasicAuth(),
+    }
+  }
+
+  protected async handleAPIResponse<T>(promise: Promise<Response>): Promise<T | APIError> {
+    try {
+      const response = await promise
+      if (response.ok) {
+        return (await response.json()) as T
+      }
+      if (response.status === 400) {
+        return new BadRequestError(await response.text())
+      }
+      if (response.status === 401) {
+        return new AuthenticationError(await response.text())
+      }
+      return new InternalServerError(await response.text())
+    } catch (error) {
+      return new NetworkError('' + error)
+    }
+  }
+
+  protected async handleAPIResponseWithNoBody(
+    promise: Promise<Response>,
+  ): Promise<void | APIError> {
+    try {
+      const response = await promise
+      if (response.ok) return undefined
+      if (response.status === 401) {
+        return new AuthenticationError(await response.text())
+      }
+      return new InternalServerError(await response.text())
+    } catch (error) {
+      return new NetworkError('' + error)
+    }
+  }
+}
diff --git a/app/src/api/classroom_compliance.ts b/app/src/api/classroom_compliance.ts
index 75fd560..8e214d8 100644
--- a/app/src/api/classroom_compliance.ts
+++ b/app/src/api/classroom_compliance.ts
@@ -1,4 +1,4 @@
-import { getAuthHeaders } from '@/api/auth'
+import { APIClient, type APIResponse, type AuthStoreType } from './base'
 
 const BASE_URL = import.meta.env.VITE_API_URL + '/classroom-compliance'
 
@@ -16,100 +16,120 @@ export interface Student {
   removed: boolean
 }
 
-export interface EntryResponseItemPhone {
+export interface EntryPhone {
   compliant: boolean
 }
 
-export interface EntryResponseItemBehavior {
+export interface EntryBehavior {
   rating: number
   comment?: string
 }
 
-export interface EntryResponseItem {
+export interface Entry {
   id: number
   date: string
-  createdAt: string
+  createdAt: number
   absent: boolean
-  phone?: EntryResponseItemPhone
-  behavior?: EntryResponseItemBehavior
+  phone: EntryPhone | null
+  behavior: EntryBehavior | null
 }
 
-export interface EntryResponseStudent {
+export function getDefaultEntry(dateStr: string): Entry {
+  return {
+    id: 0,
+    date: dateStr,
+    createdAt: Date.now(),
+    absent: false,
+    phone: { compliant: true },
+    behavior: { rating: 3 },
+  }
+}
+
+export interface EntriesResponseStudent {
   id: number
   name: string
   deskNumber: number
   removed: boolean
-  entries: Record<string, EntryResponseItem | null>
+  entries: Record<string, Entry | null>
 }
 
 export interface EntriesResponse {
-  students: EntryResponseStudent[]
+  students: EntriesResponseStudent[]
   dates: string[]
 }
 
-function getClassPath(classId: number): string {
-  return BASE_URL + '/classes/' + classId
+export interface StudentDataPayload {
+  name: string
+  deskNumber: number
+  removed: boolean
 }
 
-export async function createClass(
-  auth: string,
-  number: number,
-  schoolYear: string,
-): Promise<Class> {
-  const response = await fetch(BASE_URL + '/classes', {
-    method: 'POST',
-    headers: getAuthHeaders(auth),
-    body: JSON.stringify({ number: number, schoolYear: schoolYear }),
-  })
-  return (await response.json()) as Class
+export interface EntriesPayloadStudent {
+  id: number
+  entries: Record<string, Entry | null>
 }
 
-export async function getClasses(auth: string): Promise<Class[]> {
-  const response = await fetch(BASE_URL + '/classes', {
-    headers: getAuthHeaders(auth),
-  })
-  return (await response.json()) as Class[]
+export interface EntriesPayload {
+  students: EntriesPayloadStudent[]
 }
 
-export async function getClass(auth: string, id: number): Promise<Class> {
-  const response = await fetch(getClassPath(id), {
-    headers: getAuthHeaders(auth),
-  })
-  return (await response.json()) as Class
-}
+export class ClassroomComplianceAPIClient extends APIClient {
+  constructor(authStore: AuthStoreType) {
+    super(BASE_URL, authStore)
+  }
 
-export async function deleteClass(auth: string, classId: number): Promise<void> {
-  const response = await fetch(getClassPath(classId), {
-    method: 'DELETE',
-    headers: getAuthHeaders(auth),
-  })
-  if (!response.ok) {
-    throw new Error('Failed to delete class.')
+  createClass(number: number, schoolYear: string): APIResponse<Class> {
+    return super.post('/classes', { number: number, schoolYear: schoolYear })
+  }
+
+  getClasses(): APIResponse<Class[]> {
+    return super.get('/classes')
+  }
+
+  getClass(classId: number): APIResponse<Class> {
+    return super.get(`/classes/${classId}`)
+  }
+
+  deleteClass(classId: number): APIResponse<void> {
+    return super.delete(`/classes/${classId}`)
+  }
+
+  getStudents(classId: number): APIResponse<Student[]> {
+    return super.get(`/classes/${classId}/students`)
+  }
+
+  getStudent(classId: number, studentId: number): APIResponse<Student> {
+    return super.get(`/classes/${classId}/students/${studentId}`)
+  }
+
+  createStudent(classId: number, data: StudentDataPayload): APIResponse<Student> {
+    return super.post(`/classes/${classId}/students`, data)
+  }
+
+  updateStudent(
+    classId: number,
+    studentId: number,
+    data: StudentDataPayload,
+  ): APIResponse<Student> {
+    return super.put(`/classes/${classId}/students/${studentId}`, data)
+  }
+
+  deleteStudent(classId: number, studentId: number): APIResponse<void> {
+    return super.delete(`/classes/${classId}/students/${studentId}`)
+  }
+
+  getEntries(classId: number, fromDate?: Date, toDate?: Date): APIResponse<EntriesResponse> {
+    const params = new URLSearchParams()
+    if (fromDate) {
+      params.append('from', fromDate.toISOString().substring(0, 10))
+    }
+    if (toDate) {
+      params.append('to', toDate.toISOString().substring(0, 10))
+    }
+    return super.get(`/classes/${classId}/entries?${params.toString()}`)
+  }
+
+  saveEntries(classId: number, payload: EntriesPayload): APIResponse<void> {
+    return super.postWithNoExpectedResponse(`/classes/${classId}/entries`, payload)
   }
 }
-
-export async function getStudents(auth: string, classId: number): Promise<Student[]> {
-  const response = await fetch(getClassPath(classId) + '/students', {
-    headers: getAuthHeaders(auth),
-  })
-  return (await response.json()) as Student[]
-}
-
-export async function getEntries(
-  auth: string,
-  classId: number,
-  fromDate?: Date,
-  toDate?: Date,
-): Promise<EntriesResponse> {
-  const params = new URLSearchParams()
-  if (fromDate) {
-    params.append('from', fromDate.toISOString().substring(0, 10))
-  }
-  if (toDate) {
-    params.append('to', toDate.toISOString().substring(0, 10))
-  }
-  const response = await fetch(getClassPath(classId) + '/entries?' + params.toString(), {
-    headers: getAuthHeaders(auth),
-  })
-  return (await response.json()) as EntriesResponse
-}
diff --git a/app/src/apps/classroom_compliance/ClassItem.vue b/app/src/apps/classroom_compliance/ClassItem.vue
index b198f45..184accc 100644
--- a/app/src/apps/classroom_compliance/ClassItem.vue
+++ b/app/src/apps/classroom_compliance/ClassItem.vue
@@ -1,5 +1,5 @@
 <script setup lang="ts">
-import { type Class } from '@/api/classroom_compliance';
+import { type Class } from '@/api/classroom_compliance'
 
 defineProps<{
   cls: Class
diff --git a/app/src/apps/classroom_compliance/ClassView.vue b/app/src/apps/classroom_compliance/ClassView.vue
index 8e43327..783d174 100644
--- a/app/src/apps/classroom_compliance/ClassView.vue
+++ b/app/src/apps/classroom_compliance/ClassView.vue
@@ -1,22 +1,34 @@
 <script setup lang="ts">
-import { getClass, getStudents, type Class, type Student } from '@/api/classroom_compliance';
-import { useAuthStore } from '@/stores/auth';
-import { onMounted, ref, type Ref } from 'vue';
-import EntriesTable from '@/apps/classroom_compliance/EntriesTable.vue';
+import { useAuthStore } from '@/stores/auth'
+import { onMounted, ref, useTemplateRef, type Ref } from 'vue'
+import EntriesTable from '@/apps/classroom_compliance/EntriesTable.vue'
+import { RouterLink, useRouter } from 'vue-router'
+import ConfirmDialog from '@/components/ConfirmDialog.vue'
+import { ClassroomComplianceAPIClient, type Class } from '@/api/classroom_compliance'
 
 const props = defineProps<{
   id: string
 }>()
 const authStore = useAuthStore()
+const router = useRouter()
 const cls: Ref<Class | null> = ref(null)
-const students: Ref<Student[]> = ref([])
+const apiClient = new ClassroomComplianceAPIClient(authStore)
+
+const deleteClassDialog = useTemplateRef('deleteClassDialog')
 onMounted(async () => {
   const idNumber = parseInt(props.id, 10)
-  cls.value = await getClass(authStore.getBasicAuth(), idNumber)
-  getStudents(authStore.getBasicAuth(), idNumber).then(r => {
-    students.value = r
-  })
+  cls.value = await apiClient.getClass(idNumber).handleErrorsWithAlert()
+  if (!cls.value) {
+    await router.back()
+    return
+  }
 })
+
+async function deleteThisClass() {
+  if (!cls.value || !(await deleteClassDialog.value?.show())) return
+  await apiClient.deleteClass(cls.value.id).handleErrorsWithAlert()
+  await router.replace('/classroom-compliance')
+}
 </script>
 <template>
   <div v-if="cls">
@@ -26,12 +38,22 @@ onMounted(async () => {
     <div>
       <div>
         <span>Actions: </span>
-        <button type="button">Add Student - WIP</button>
-        <button type="button">Delete this Class</button>
+        <RouterLink :to="'/classroom-compliance/classes/' + cls.id + '/edit-student'"
+          >Add Student</RouterLink
+        >
+        <button type="button" @click="deleteThisClass">Delete this Class</button>
       </div>
     </div>
 
     <EntriesTable :classId="cls.id" />
+
+    <ConfirmDialog ref="deleteClassDialog">
+      <p>
+        Are you sure you want to delete this class? All data associated with it (settings, students,
+        entries, grades, etc.) will be <strong>permanently deleted</strong>, and deleted data is not
+        recoverable.
+      </p>
+    </ConfirmDialog>
   </div>
 </template>
 <style scoped></style>
diff --git a/app/src/apps/classroom_compliance/ClassesView.vue b/app/src/apps/classroom_compliance/ClassesView.vue
index 2b1cbeb..8d590b5 100644
--- a/app/src/apps/classroom_compliance/ClassesView.vue
+++ b/app/src/apps/classroom_compliance/ClassesView.vue
@@ -1,17 +1,23 @@
 <script setup lang="ts">
-import { type Class, getClasses } from '@/api/classroom_compliance';
-import { useAuthStore } from '@/stores/auth';
-import { type Ref, ref, onMounted } from 'vue';
-import ClassItem from '@/apps/classroom_compliance/ClassItem.vue';
+import { ClassroomComplianceAPIClient, type Class } from '@/api/classroom_compliance'
+import { useAuthStore } from '@/stores/auth'
+import { type Ref, ref, onMounted } from 'vue'
+import ClassItem from '@/apps/classroom_compliance/ClassItem.vue'
 
 const classes: Ref<Class[]> = ref([])
 
 const authStore = useAuthStore()
+const apiClient = new ClassroomComplianceAPIClient(authStore)
 
 onMounted(async () => {
-  classes.value = await getClasses(authStore.getBasicAuth())
+  classes.value = (await apiClient.getClasses().handleErrorsWithAlert()) ?? []
 })
 </script>
 <template>
-  <ClassItem v-for="cls in classes" :key="cls.id" :cls="cls" />
+  <div>
+    <div>
+      <RouterLink to="/classroom-compliance/edit-class">Add Class</RouterLink>
+    </div>
+    <ClassItem v-for="cls in classes" :key="cls.id" :cls="cls" />
+  </div>
 </template>
diff --git a/app/src/apps/classroom_compliance/EditClassView.vue b/app/src/apps/classroom_compliance/EditClassView.vue
new file mode 100644
index 0000000..0948460
--- /dev/null
+++ b/app/src/apps/classroom_compliance/EditClassView.vue
@@ -0,0 +1,78 @@
+<script setup lang="ts">
+import { ClassroomComplianceAPIClient, type Class } from '@/api/classroom_compliance'
+import { useAuthStore } from '@/stores/auth'
+import { onMounted, ref, type Ref } from 'vue'
+import { useRoute, useRouter } from 'vue-router'
+
+const authStore = useAuthStore()
+const route = useRoute()
+const router = useRouter()
+const cls: Ref<Class | null> = ref(null)
+
+interface ClassFormData {
+  number: number
+  schoolYear: string
+}
+const formData: Ref<ClassFormData> = ref({ number: 1, schoolYear: '2024-2025' })
+const apiClient = new ClassroomComplianceAPIClient(authStore)
+
+onMounted(async () => {
+  if ('classId' in route.query && typeof route.query.classId === 'string') {
+    const classId = parseInt(route.query.classId, 10)
+    cls.value = await apiClient.getClass(classId).handleErrorsWithAlert()
+    if (!cls.value) {
+      await router.back()
+      return
+    }
+    formData.value.number = cls.value.number
+    formData.value.schoolYear = cls.value.schoolYear
+  }
+})
+
+async function submitForm() {
+  if (cls.value) {
+    // TODO: Update class
+  } else {
+    const result = await apiClient
+      .createClass(formData.value.number, formData.value.schoolYear)
+      .handleErrorsWithAlert()
+    if (result) {
+      await router.replace(`/classroom-compliance/classes/${result.id}`)
+    }
+  }
+}
+
+function resetForm() {
+  if (cls.value) {
+    formData.value.number = cls.value.number
+    formData.value.schoolYear = cls.value.schoolYear
+  } else {
+    formData.value.number = 1
+    formData.value.schoolYear = '2024-2025'
+  }
+  router.back()
+}
+</script>
+<template>
+  <div>
+    <h2>
+      <span v-if="cls" v-text="'Edit Class ' + cls.id"></span>
+      <span v-if="!cls">Add New Class</span>
+    </h2>
+
+    <form @submit.prevent="submitForm" @reset.prevent="resetForm">
+      <div>
+        <label for="number-input">Number</label>
+        <input id="number-input" type="number" v-model="formData.number" required />
+      </div>
+      <div>
+        <label for="school-year-input">School Year (example: "2024-2025")</label>
+        <input id="school-year-input" type="text" v-model="formData.schoolYear" required />
+      </div>
+      <div>
+        <button type="submit">Save</button>
+        <button type="reset">Cancel</button>
+      </div>
+    </form>
+  </div>
+</template>
diff --git a/app/src/apps/classroom_compliance/EditStudentView.vue b/app/src/apps/classroom_compliance/EditStudentView.vue
new file mode 100644
index 0000000..1a321e7
--- /dev/null
+++ b/app/src/apps/classroom_compliance/EditStudentView.vue
@@ -0,0 +1,117 @@
+<script setup lang="ts">
+import {
+  ClassroomComplianceAPIClient,
+  type Class,
+  type Student,
+  type StudentDataPayload,
+} from '@/api/classroom_compliance'
+import { useAuthStore } from '@/stores/auth'
+import { onMounted, ref, type Ref } from 'vue'
+import { useRoute, useRouter } from 'vue-router'
+
+const props = defineProps<{
+  classId: string
+}>()
+const authStore = useAuthStore()
+const route = useRoute()
+const router = useRouter()
+const cls: Ref<Class | null> = ref(null)
+const student: Ref<Student | null> = ref(null)
+const apiClient = new ClassroomComplianceAPIClient(authStore)
+
+interface StudentFormData {
+  name: string
+  deskNumber: number | null
+  removed: boolean
+}
+
+const formData: Ref<StudentFormData> = ref({ name: '', deskNumber: null, removed: false })
+
+onMounted(async () => {
+  const classIdNumber = parseInt(props.classId, 10)
+  cls.value = await apiClient.getClass(classIdNumber).handleErrorsWithAlert()
+  if (!cls.value) {
+    await router.replace('/classroom-compliance')
+    return
+  }
+  if ('studentId' in route.query && typeof route.query.studentId === 'string') {
+    const studentId = parseInt(route.query.studentId, 10)
+    student.value = await apiClient.getStudent(classIdNumber, studentId).handleErrorsWithAlert()
+    if (!student.value) {
+      await router.replace(`/classroom-compliance/classes/${classIdNumber}`)
+      return
+    }
+    formData.value.name = student.value.name
+    formData.value.deskNumber = student.value.deskNumber
+    formData.value.removed = student.value.removed
+  }
+})
+
+async function submitForm() {
+  const classId = parseInt(props.classId, 10)
+  const data: StudentDataPayload = {
+    name: formData.value.name,
+    deskNumber: formData.value.deskNumber ?? 0,
+    removed: formData.value.removed,
+  }
+  if (student.value) {
+    const updatedStudent = await apiClient
+      .updateStudent(classId, student.value.id, data)
+      .handleErrorsWithAlert()
+    if (updatedStudent) {
+      await router.replace(`/classroom-compliance/classes/${classId}/students/${updatedStudent.id}`)
+    }
+  } else {
+    const newStudent = await apiClient.createStudent(classId, data).handleErrorsWithAlert()
+    if (newStudent) {
+      await router.replace(`/classroom-compliance/classes/${classId}/students/${newStudent.id}`)
+    }
+  }
+}
+
+function resetForm() {
+  if (student.value) {
+    formData.value = {
+      name: student.value.name,
+      deskNumber: student.value.deskNumber,
+      removed: student.value.removed,
+    }
+  } else {
+    formData.value = {
+      name: '',
+      deskNumber: null,
+      removed: false,
+    }
+  }
+  router.back()
+}
+</script>
+<template>
+  <div v-if="cls">
+    <h2>
+      <span v-if="student" v-text="'Edit ' + student.name"></span>
+      <span v-if="!student">Add New Student</span>
+    </h2>
+
+    <p>From class <span v-text="cls.number + ', ' + cls.schoolYear"></span></p>
+
+    <form @submit.prevent="submitForm" @reset.prevent="resetForm">
+      <div>
+        <label for="name-input">Name</label>
+        <input id="name-input" type="text" v-model="formData.name" required />
+      </div>
+      <div>
+        <label for="desk-input">Desk Number</label>
+        <input id="desk-input" type="number" v-model="formData.deskNumber" />
+      </div>
+      <div>
+        <label for="removed-checkbox">Removed</label>
+        <input id="removed-checkbox" type="checkbox" v-model="formData.removed" />
+      </div>
+      <div>
+        <button type="submit">Save</button>
+        <button type="reset">Cancel</button>
+      </div>
+    </form>
+  </div>
+</template>
diff --git a/app/src/apps/classroom_compliance/EntriesTable.vue b/app/src/apps/classroom_compliance/EntriesTable.vue
index 662f2fc..89398d0 100644
--- a/app/src/apps/classroom_compliance/EntriesTable.vue
+++ b/app/src/apps/classroom_compliance/EntriesTable.vue
@@ -1,18 +1,33 @@
 <script setup lang="ts">
-import { getEntries, type EntryResponseStudent } from '@/api/classroom_compliance';
-import { useAuthStore } from '@/stores/auth';
-import { onMounted, ref, type Ref } from 'vue';
-import EntryTableCell from './EntryTableCell.vue';
+import {
+  ClassroomComplianceAPIClient,
+  getDefaultEntry,
+  type EntriesPayload,
+  type EntriesPayloadStudent,
+  type EntriesResponseStudent,
+} from '@/api/classroom_compliance'
+import { useAuthStore } from '@/stores/auth'
+import { computed, onMounted, ref, type Ref } from 'vue'
+import EntryTableCell from './EntryTableCell.vue'
+import { RouterLink } from 'vue-router'
 
 const authStore = useAuthStore()
 const props = defineProps<{
   classId: number
 }>()
+const apiClient = new ClassroomComplianceAPIClient(authStore)
 
-const students: Ref<EntryResponseStudent[]> = ref([])
+const students: Ref<EntriesResponseStudent[]> = ref([])
+const lastSaveState: Ref<string | null> = ref(null)
+const lastSaveStateTimestamp: Ref<number> = ref(0)
 const dates: Ref<string[]> = ref([])
 const toDate: Ref<Date> = ref(new Date())
 const fromDate: Ref<Date> = ref(new Date())
+
+const entriesChangedSinceLastSave = computed(() => {
+  return lastSaveState.value === null || lastSaveState.value !== JSON.stringify(students.value)
+})
+
 onMounted(async () => {
   toDate.value.setHours(0, 0, 0, 0)
   fromDate.value.setHours(0, 0, 0, 0)
@@ -21,14 +36,20 @@ onMounted(async () => {
 })
 
 async function loadEntries() {
-  const entries = await getEntries(
-    authStore.getBasicAuth(),
-    props.classId,
-    fromDate.value,
-    toDate.value
-  )
-  students.value = entries.students
-  dates.value = entries.dates
+  const entries = await apiClient
+    .getEntries(props.classId, fromDate.value, toDate.value)
+    .handleErrorsWithAlert()
+  if (entries) {
+    students.value = entries.students
+    lastSaveState.value = JSON.stringify(entries.students)
+    lastSaveStateTimestamp.value = Date.now()
+    dates.value = entries.dates
+  } else {
+    students.value = []
+    lastSaveState.value = null
+    lastSaveStateTimestamp.value = Date.now()
+    dates.value = []
+  }
 }
 
 function shiftDateRange(days: number) {
@@ -41,30 +62,113 @@ async function showPreviousDay() {
   await loadEntries()
 }
 
+async function showToday() {
+  toDate.value = new Date()
+  toDate.value.setHours(0, 0, 0, 0)
+  fromDate.value = new Date()
+  fromDate.value.setHours(0, 0, 0, 0)
+  fromDate.value.setDate(fromDate.value.getDate() - 4)
+  await loadEntries()
+}
+
 async function showNextDay() {
   shiftDateRange(1)
   await loadEntries()
 }
+
+async function saveEdits() {
+  if (!lastSaveState.value) {
+    console.warn('No lastSaveState, cannot determine what edits were made.')
+    await loadEntries()
+    return
+  }
+
+  const payload: EntriesPayload = { students: [] }
+  // Get a list of edits which have changed.
+  const lastSaveStateObj: EntriesResponseStudent[] = JSON.parse(lastSaveState.value)
+  for (let i = 0; i < students.value.length; i++) {
+    const student: EntriesResponseStudent = students.value[i]
+    const studentPayload: EntriesPayloadStudent = { id: student.id, entries: {} }
+    for (const [dateStr, entry] of Object.entries(student.entries)) {
+      const lastSaveStateEntry = lastSaveStateObj[i].entries[dateStr]
+      if (JSON.stringify(lastSaveStateEntry) !== JSON.stringify(entry)) {
+        studentPayload.entries[dateStr] = JSON.parse(JSON.stringify(entry))
+      }
+    }
+    if (Object.keys(studentPayload.entries).length > 0) {
+      payload.students.push(studentPayload)
+    }
+  }
+  await apiClient.saveEntries(props.classId, payload).handleErrorsWithAlert()
+  await loadEntries()
+}
+
+async function discardEdits() {
+  if (lastSaveState.value) {
+    students.value = JSON.parse(lastSaveState.value)
+  } else {
+    await loadEntries()
+  }
+}
+
+function getDate(dateStr: string): Date {
+  const year = parseInt(dateStr.substring(0, 4), 10)
+  const month = parseInt(dateStr.substring(5, 7), 10)
+  const day = parseInt(dateStr.substring(8, 10), 10)
+  return new Date(year, month - 1, day)
+}
+
+function getWeekday(date: Date): string {
+  const names = ['Sunday', 'Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday', 'Saturday']
+  return names[date.getDay()]
+}
+
+function addAllEntriesForDate(dateStr: string) {
+  for (let i = 0; i < students.value.length; i++) {
+    const student = students.value[i]
+    if (student.removed) continue
+    if (!(dateStr in student.entries) || student.entries[dateStr] === null) {
+      student.entries[dateStr] = getDefaultEntry(dateStr)
+    }
+  }
+}
 </script>
 <template>
   <div>
-    <div>
+    <div class="buttons-bar">
       <button type="button" @click="showPreviousDay">Previous Day</button>
+      <button type="button" @click="showToday">Today</button>
       <button type="button" @click="showNextDay">Next Day</button>
+      <button type="button" @click="saveEdits" :disabled="!entriesChangedSinceLastSave">
+        Save
+      </button>
+      <button type="button" @click="discardEdits" :disabled="!entriesChangedSinceLastSave">
+        Discard Edits
+      </button>
     </div>
     <table class="entries-table">
       <thead>
         <tr>
           <th>Student</th>
           <th>Desk</th>
-          <th v-for="date in dates" :key="date" v-text="date"></th>
+          <th v-for="date in dates" :key="date">
+            <span>{{ getDate(date).toLocaleDateString() }}</span>
+            <span @click="addAllEntriesForDate(date)">➕</span>
+            <br />
+            <span>{{ getWeekday(getDate(date)) }}</span>
+          </th>
         </tr>
       </thead>
       <tbody>
         <tr v-for="student in students" :key="student.id">
-          <td v-text="student.name" :class="{ 'student-removed': student.removed }"></td>
+          <td :class="{ 'student-removed': student.removed }">
+            <RouterLink :to="'/classroom-compliance/classes/' + classId + '/students/' + student.id">
+              <span v-text="student.name"></span>
+            </RouterLink>
+          </td>
           <td v-text="student.deskNumber"></td>
-          <EntryTableCell v-for="(entry, date) in student.entries" :key="date" :entry="entry" />
+          <EntryTableCell v-for="(entry, date) in student.entries" :key="date" v-model="student.entries[date]"
+            :date-str="date" :last-save-state-timestamp="lastSaveStateTimestamp" />
         </tr>
       </tbody>
     </table>
@@ -87,4 +191,13 @@ async function showNextDay() {
 .student-removed {
   background-color: lightgray;
 }
+
+.buttons-bar {
+  margin-top: 0.5em;
+  margin-bottom: 0.5em;
+}
+
+.buttons-bar>button+button {
+  margin-left: 0.5em;
+}
 </style>
diff --git a/app/src/apps/classroom_compliance/EntryTableCell.vue b/app/src/apps/classroom_compliance/EntryTableCell.vue
index e9f8b21..053f069 100644
--- a/app/src/apps/classroom_compliance/EntryTableCell.vue
+++ b/app/src/apps/classroom_compliance/EntryTableCell.vue
@@ -1,26 +1,103 @@
 <script setup lang="ts">
-import type { EntryResponseItem } from '@/api/classroom_compliance';
+import { getDefaultEntry, type Entry } from '@/api/classroom_compliance'
+import { computed, onMounted, ref, watch, type Ref } from 'vue'
 
-defineProps<{
-  entry: EntryResponseItem | null
+const props = defineProps<{
+  dateStr: string
+  lastSaveStateTimestamp: number
 }>()
+
+const model = defineModel<Entry | null>({
+  required: false,
+})
+const initialEntryJson: Ref<string> = ref('')
+const previouslyRemovedEntry: Ref<Entry | null> = ref(null)
+
+const entryChanged = computed(() => JSON.stringify(model.value) !== initialEntryJson.value)
+
+onMounted(() => {
+  initialEntryJson.value = JSON.stringify(model.value)
+  watch(
+    () => props.lastSaveStateTimestamp,
+    () => {
+      initialEntryJson.value = JSON.stringify(model.value)
+      previouslyRemovedEntry.value = null
+    },
+  )
+})
+
+function toggleAbsence() {
+  if (model.value) {
+    model.value.absent = !model.value.absent
+    if (model.value.absent) {
+      // Remove additional data if student is absent.
+      model.value.phone = null
+      model.value.behavior = null
+    } else {
+      // Populate default additional data if student is no longer absent.
+      model.value.phone = { compliant: true }
+      model.value.behavior = { rating: 3 }
+    }
+  }
+}
+
+function togglePhoneCompliance() {
+  if (model.value && model.value.phone) {
+    model.value.phone.compliant = !model.value.phone.compliant
+  }
+}
+
+function toggleBehaviorRating() {
+  if (model.value && model.value.behavior) {
+    model.value.behavior.rating = model.value.behavior.rating - 1
+    if (model.value.behavior.rating < 1) {
+      model.value.behavior.rating = 3
+    }
+  }
+}
+
+function removeEntry() {
+  if (model.value) {
+    previouslyRemovedEntry.value = JSON.parse(JSON.stringify(model.value))
+  }
+  model.value = null
+}
+
+function addEntry() {
+  if (previouslyRemovedEntry.value) {
+    model.value = JSON.parse(JSON.stringify(previouslyRemovedEntry.value))
+  } else {
+    model.value = getDefaultEntry(props.dateStr)
+  }
+}
 </script>
 <template>
-  <td v-if="entry" :class="{ absent: entry.absent }">
-    <span v-if="entry.absent">Absent</span>
-    <div v-if="!entry.absent">
-      <div class="status-item">
-        <span v-if="entry.phone?.compliant">📱</span>
-        <span v-if="!entry.phone?.compliant">📵</span>
+  <td :class="{ absent: model?.absent, changed: entryChanged, 'missing-entry': !model }">
+    <div v-if="model">
+      <div class="status-item" @click="toggleAbsence">
+        <span v-if="model.absent">Absent</span>
+        <span v-if="!model.absent">Present</span>
       </div>
-      <div class="status-item">
-        <span v-if="entry.behavior?.rating === 3">😇</span>
-        <span v-if="entry.behavior?.rating === 2">😐</span>
-        <span v-if="entry.behavior?.rating === 1">😡</span>
+      <div class="status-item" @click="togglePhoneCompliance" v-if="!model.absent">
+        <span v-if="model.phone?.compliant">📱</span>
+        <span v-if="!model.phone?.compliant">📵</span>
+      </div>
+      <div class="status-item" @click="toggleBehaviorRating" v-if="!model.absent">
+        <span v-if="model.behavior?.rating === 3">😇</span>
+        <span v-if="model.behavior?.rating === 2">😐</span>
+        <span v-if="model.behavior?.rating === 1">😡</span>
+      </div>
+      <div class="status-item" @click="removeEntry">
+        <span>🗑️</span>
+      </div>
+    </div>
+
+    <div v-if="model === null">
+      <div class="status-item" @click="addEntry">
+        <span>➕</span>
       </div>
     </div>
   </td>
-  <td v-if="entry === null" class="missing-entry"></td>
 </template>
 <style scoped>
 td {
@@ -30,8 +107,7 @@ td {
 
 .missing-entry {
   background-color: lightgray;
-  text-align: center;
-  font-style: italic;
+  text-align: right;
 }
 
 .absent {
@@ -39,8 +115,16 @@ td {
   border: 1px solid black;
 }
 
+.changed {
+  border: 2px solid orange !important;
+}
+
 .status-item {
   display: inline-block;
   cursor: pointer;
 }
+
+.status-item+.status-item {
+  margin-left: 0.25em;
+}
 </style>
diff --git a/app/src/apps/classroom_compliance/MainView.vue b/app/src/apps/classroom_compliance/MainView.vue
index f58bdc7..7f0686b 100644
--- a/app/src/apps/classroom_compliance/MainView.vue
+++ b/app/src/apps/classroom_compliance/MainView.vue
@@ -1,15 +1,17 @@
-<script setup lang="ts">
-</script>
+<script setup lang="ts"></script>
 <template>
   <main>
     <h1>Classroom Compliance</h1>
-    <p>With this application, you can track each student's compliance to various classroom policies, like:</p>
+    <p>
+      With this application, you can track each student's compliance to various classroom policies,
+      like:
+    </p>
     <ul>
       <li>Attendance</li>
       <li>Phone Usage (or lack thereof)</li>
       <li>Behavior</li>
     </ul>
-    <hr>
+    <hr />
 
     <RouterView />
   </main>
diff --git a/app/src/apps/classroom_compliance/StudentView.vue b/app/src/apps/classroom_compliance/StudentView.vue
new file mode 100644
index 0000000..7d6c206
--- /dev/null
+++ b/app/src/apps/classroom_compliance/StudentView.vue
@@ -0,0 +1,72 @@
+<script setup lang="ts">
+import { ClassroomComplianceAPIClient, type Class, type Student } from '@/api/classroom_compliance'
+import ConfirmDialog from '@/components/ConfirmDialog.vue'
+import { useAuthStore } from '@/stores/auth'
+import { onMounted, ref, useTemplateRef, type Ref } from 'vue'
+import { useRouter } from 'vue-router'
+
+const props = defineProps<{
+  classId: string
+  studentId: string
+}>()
+const authStore = useAuthStore()
+const router = useRouter()
+const cls: Ref<Class | null> = ref(null)
+const student: Ref<Student | null> = ref(null)
+const apiClient = new ClassroomComplianceAPIClient(authStore)
+const deleteConfirmDialog = useTemplateRef('deleteConfirmDialog')
+onMounted(async () => {
+  const classIdNumber = parseInt(props.classId, 10)
+  cls.value = await apiClient.getClass(classIdNumber).handleErrorsWithAlert()
+  if (!cls.value) {
+    await router.replace('/classroom-compliance')
+    return
+  }
+  const studentIdNumber = parseInt(props.studentId, 10)
+  student.value = await apiClient.getStudent(classIdNumber, studentIdNumber).handleErrorsWithAlert()
+  if (!student.value) {
+    await router.replace(`/classroom-compliance/classes/${cls.value.id}`)
+    return
+  }
+})
+
+async function deleteThisStudent() {
+  if (!cls.value || !student.value) return
+  const choice = await deleteConfirmDialog.value?.show()
+  if (!choice) return
+  await apiClient.deleteStudent(cls.value.id, student.value.id)
+  await router.replace(`/classroom-compliance/classes/${cls.value.id}`)
+}
+</script>
+<template>
+  <div v-if="student">
+    <h2 v-text="student.name"></h2>
+    <p>
+      From
+      <RouterLink :to="'/classroom-compliance/classes/' + classId">
+        <span v-text="'class ' + cls?.number + ', ' + cls?.schoolYear"></span>
+      </RouterLink>
+    </p>
+    <ul>
+      <li>Internal ID: <span v-text="student.id"></span></li>
+      <li>Removed: <span v-text="student.removed"></span></li>
+      <li>Desk number: <span v-text="student.deskNumber"></span></li>
+    </ul>
+    <RouterLink
+      :to="
+        '/classroom-compliance/classes/' + student.classId + '/edit-student?studentId=' + student.id
+      "
+    >
+      Edit
+    </RouterLink>
+    <button type="button" @click="deleteThisStudent">Delete</button>
+
+    <ConfirmDialog ref="deleteConfirmDialog">
+      <p>
+        Are you sure you want to delete <span v-text="student.name"></span>? This will permanently
+        delete all records for them.
+      </p>
+      <p>This <strong>cannot</strong> be undone!</p>
+    </ConfirmDialog>
+  </div>
+</template>
diff --git a/app/src/components/AlertDialog.vue b/app/src/components/AlertDialog.vue
new file mode 100644
index 0000000..f1931da
--- /dev/null
+++ b/app/src/components/AlertDialog.vue
@@ -0,0 +1,9 @@
+<script setup lang="ts"></script>
+<template>
+  <dialog id="alert-dialog">
+    <p id="alert-dialog-message"></p>
+    <div>
+      <button type="button" id="alert-dialog-close-button">Close</button>
+    </div>
+  </dialog>
+</template>
diff --git a/app/src/components/ConfirmDialog.vue b/app/src/components/ConfirmDialog.vue
new file mode 100644
index 0000000..d6153cb
--- /dev/null
+++ b/app/src/components/ConfirmDialog.vue
@@ -0,0 +1,54 @@
+<script setup lang="ts">
+import { ref } from 'vue'
+
+const dialog = ref<HTMLDialogElement>()
+const result = ref(false)
+
+function onCancelClicked() {
+  result.value = false
+  dialog.value?.close('false')
+}
+
+function onConfirmClicked() {
+  result.value = true
+  dialog.value?.close('true')
+}
+
+async function show(): Promise<boolean> {
+  dialog.value?.showModal()
+  return new Promise((resolve) => {
+    dialog.value?.addEventListener('close', () => {
+      if (dialog.value?.returnValue === 'true') {
+        resolve(true)
+      } else {
+        resolve(false)
+      }
+    })
+  })
+}
+
+defineExpose({
+  show,
+})
+</script>
+<template>
+  <dialog ref="dialog" method="dialog">
+    <form>
+      <slot></slot>
+
+      <div class="confirm-dialog-buttons">
+        <button @click.prevent="onConfirmClicked">Confirm</button>
+        <button @click.prevent="onCancelClicked">Cancel</button>
+      </div>
+    </form>
+  </dialog>
+</template>
+<style>
+.confirm-dialog-buttons {
+  text-align: right;
+}
+
+.confirm-dialog-buttons > button {
+  margin-left: 0.5em;
+}
+</style>
diff --git a/app/src/router/index.ts b/app/src/router/index.ts
index 8db28cd..6cd3011 100644
--- a/app/src/router/index.ts
+++ b/app/src/router/index.ts
@@ -26,6 +26,20 @@ const router = createRouter({
           component: () => import('@/apps/classroom_compliance/ClassView.vue'),
           props: true,
         },
+        {
+          path: 'edit-class',
+          component: () => import('@/apps/classroom_compliance/EditClassView.vue'),
+        },
+        {
+          path: 'classes/:classId/students/:studentId',
+          component: () => import('@/apps/classroom_compliance/StudentView.vue'),
+          props: true,
+        },
+        {
+          path: 'classes/:classId/edit-student',
+          component: () => import('@/apps/classroom_compliance/EditStudentView.vue'),
+          props: true,
+        },
       ],
     },
   ],
diff --git a/app/src/views/LoginView.vue b/app/src/views/LoginView.vue
index 676acc4..e39b229 100644
--- a/app/src/views/LoginView.vue
+++ b/app/src/views/LoginView.vue
@@ -1,5 +1,5 @@
 <script setup lang="ts">
-import { login } from '@/api/auth';
+import { AuthenticationAPIClient } from '@/api/auth'
 import { useAuthStore } from '@/stores/auth'
 import { ref, type Ref } from 'vue'
 import { useRouter } from 'vue-router'
@@ -12,14 +12,13 @@ interface Credentials {
 const router = useRouter()
 const authStore = useAuthStore()
 const credentials: Ref<Credentials> = ref({ username: '', password: '' })
+const apiClient = new AuthenticationAPIClient(authStore)
 
 async function doLogin() {
-  const user = await login(credentials.value.username, credentials.value.password)
+  const user = await apiClient.login(credentials.value.username, credentials.value.password).handleErrorsWithAlert()
   if (user) {
     authStore.logIn(credentials.value.username, credentials.value.password, user)
     await router.replace('/')
-  } else {
-    console.warn('Invalid credentials.')
   }
 }
 </script>