CoTeacher AI

overview

CoTeacher AI is an intelligent course assistant platform that leverages Retrieval-Augmented Generation (RAG) to provide students with personalized, course-specific AI tutoring. The platform enables instructors to upload various course materials (PDFs, DOCX, PPTX) which are then processed, chunked, and embedded using OpenAI's API. Students can interact with a ChatGPT-style interface that answers questions based on the uploaded course content, ensuring accurate and contextually relevant responses.

tech stack

features

• multi-role authentication system (owner/TA/student) with role-based access control
• document upload and processing pipeline supporting PDF, DOCX, and PPTX formats
• server-side RAG implementation with vector embeddings and semantic search
• per-course vector database isolation for accurate, course-specific responses
• ChatGPT-style UI with conversation history and integrity guardrails
• real-time chat interface with streaming responses
• file management system with supabase storage integration

challenges

• implementing efficient chunking strategies for different document types while preserving context
• designing a scalable vector search system that maintains per-course data isolation
• balancing response accuracy with response time in the RAG pipeline
• creating an intuitive UI that handles complex document structures and long conversations