Finetune prompting

app.py

@@ -249,8 +249,8 @@ async def create_classroom(payload: ClassroomRequest = Body(...)):
         - Hours per session: {prefs.hoursPerSession}
         - Preferred learning style: {prefs.learningStyle}
         - Role perspective: {payload.role}
-        {"- Textbook URL: " + payload.textbookUrl if payload.textbookUrl else ""}
-        {"- Syllabus URL: " + payload.syllabusUrl if payload.syllabusUrl else ""}
+        {"- Textbook URL: " + payload.textbookUrl if payload.textbookUrl else "Not Available"}
+        {"- Syllabus URL: " + payload.syllabusUrl if payload.syllabusUrl else "Not Available"}
 
         Requirements:
 
@@ -262,7 +262,7 @@ async def create_classroom(payload: ClassroomRequest = Body(...)):
            - `durationHours` (fixed: {prefs.hoursPerSession})
            - `topic` (max 15 words)
            - `activities` (array of 2-3 bullet strings)
-           - `materials` (array of links/titles; include textbook chapters if URL given)
+           - `materials` (array of links/titles; include textbook chapters if URL given, else suggesting external textbook/document for referencing)
            - `homework` (concise task ≤ 50 words)
 
         3. **Output pure JSON only** using the schema: