diff --git a/frontend/src/app/dashboard/dashboard.component.html b/frontend/src/app/dashboard/dashboard.component.html
index 3b16ade..05f687c 100644
--- a/frontend/src/app/dashboard/dashboard.component.html
+++ b/frontend/src/app/dashboard/dashboard.component.html
@@ -42,7 +42,18 @@
   <div class="taskgroup-overview">
       <mat-action-list>
         <button mat-list-item class="lightBlueBtn">Manage Taskgroups</button>
-        <button mat-list-item class="taskgroup-btn">Algorithmen II</button>
+        <div mat-list-item class="taskgroup-btn">
+          <button mat-list-item (click)="test()">Algorithmen II</button>
+          <div style=" background: aliceblue">
+            <mat-action-list style="margin-left: 20px;" *ngIf="test_Var">
+              <button mat-list-item class="taskgroup-btn">
+                Vorlesungen
+              </button>
+            </mat-action-list>
+          </div>
+
+        </div>
+
         <button mat-list-item class="taskgroup-last-btn">Computer Grafik</button>
       </mat-action-list>
   </div>
diff --git a/frontend/src/app/dashboard/dashboard.component.ts b/frontend/src/app/dashboard/dashboard.component.ts
index 0a089b9..4cf6195 100644
--- a/frontend/src/app/dashboard/dashboard.component.ts
+++ b/frontend/src/app/dashboard/dashboard.component.ts
@@ -13,6 +13,7 @@ export class DashboardComponent implements OnInit{
   missedSchedules: boolean = true
   schedules: ScheduleInfo[] = []
   workedMinutesToday: number = 0
+  test_Var: boolean = false;
 
   @ViewChild('activeSchedule') activeScheduleComponent: ActiveScheduleComponent | undefined
   constructor(private scheduleService: ScheduleService) {
@@ -42,4 +43,8 @@ export class DashboardComponent implements OnInit{
     this.workedMinutesToday += stopActiveScheduleInfo.workedMinutes;
     this.schedules = this.schedules.filter(schedule => schedule.scheduleID !== stopActiveScheduleInfo.schedule.scheduleID);
   }
+
+  test() {
+    this.test_Var = !this.test_Var;
+  }
 }