diff --git a/src/app.py b/src/app.py
index 4ebb1d9..cab7d58 100644
--- a/src/app.py
+++ b/src/app.py
@@ -38,20 +38,51 @@
         "schedule": "Mondays, Wednesdays, Fridays, 2:00 PM - 3:00 PM",
         "max_participants": 30,
         "participants": ["john@mergington.edu", "olivia@mergington.edu"]
+    },
+    "Basketball Team": {
+        "description": "Competitive basketball training and games",
+        "schedule": "Mondays and Wednesdays, 4:00 PM - 5:30 PM",
+        "max_participants": 15,
+        "participants": ["alex@mergington.edu"]
+    },
+    "Tennis Club": {
+        "description": "Learn tennis skills and participate in friendly matches",
+        "schedule": "Tuesdays and Thursdays, 4:00 PM - 5:00 PM",
+        "max_participants": 10,
+        "participants": ["jordan@mergington.edu"]
+    },
+    "Drama Club": {
+        "description": "Perform in theatrical productions and develop acting skills",
+        "schedule": "Wednesdays and Fridays, 3:30 PM - 5:00 PM",
+        "max_participants": 25,
+        "participants": ["maya@mergington.edu"]
+    },
+    "Art Studio": {
+        "description": "Explore painting, drawing, and sculpture techniques",
+        "schedule": "Mondays and Thursdays, 3:30 PM - 4:30 PM",
+        "max_participants": 18,
+        "participants": ["isabelle@mergington.edu"]
+    },
+    "Debate Team": {
+        "description": "Develop critical thinking and public speaking through competitive debate",
+        "schedule": "Tuesdays, 3:30 PM - 5:00 PM",
+        "max_participants": 16,
+        "participants": ["nathan@mergington.edu"]
+    },
+    "Science Club": {
+        "description": "Conduct experiments and explore scientific concepts",
+        "schedule": "Fridays, 4:00 PM - 5:30 PM",
+        "max_participants": 20,
+        "participants": ["lucas@mergington.edu", "avery@mergington.edu"]
+    },
+    "Photography Class": {
+        "description": "Learn photography techniques and digital image editing",
+        "schedule": "Mondays and Wednesdays, 4:00 PM - 5:00 PM",
+        "max_participants": 15,
+        "participants": []
     }
 }
 
-
-@app.get("/")
-def root():
-    return RedirectResponse(url="/static/index.html")
-
-
-@app.get("/activities")
-def get_activities():
-    return activities
-
-
 @app.post("/activities/{activity_name}/signup")
 def signup_for_activity(activity_name: str, email: str):
     """Sign up a student for an activity"""
@@ -62,6 +93,10 @@ def signup_for_activity(activity_name: str, email: str):
     # Get the specific activity
     activity = activities[activity_name]
 
+    # Validate student is not already signed up
+    if email in activity["participants"]:
+        raise HTTPException(status_code=400, detail="Student already signed up for this activity")
+    
     # Add student
     activity["participants"].append(email)
     return {"message": f"Signed up {email} for {activity_name}"}