Cograding

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Inspiration

Teachers spend an enormous amount of time grading exams and assignments instead of teaching, mentoring, and supporting students. Large class sizes and manual correction make grading slow, stressful, and sometimes inconsistent. We were inspired by the idea of using AI not to replace teachers, but to assist them, giving them back time while improving feedback quality for students.

What it does

Co-Teacher is an AI-powered grading assistant that automatically corrects exams and assignments. It supports multiple question types (MCQs, short answers, and essays), generates structured feedback for students, and allows teachers to review, adjust, and validate grades before publishing results.

How we built it

We built Co-Teacher using:

An AI model for answer evaluation and feedback generation

A rubric-based grading system to ensure fairness and consistency

A backend API to handle submissions, grading, and results

A simple web interface for teachers to upload exams, define grading rules, and review results

The system was designed to keep teachers in control at every step.

Challenges we ran into

Designing fair grading logic for open-ended and essay questions

Preventing AI hallucinations in feedback generation

Balancing automation with teacher oversight

Handling different grading styles and rubrics across subjects

Accomplishments that we're proud of

Building a working AI grading pipeline in a short hackathon time

Achieving consistent and explainable grading results

Creating meaningful feedback instead of just scores

Designing a tool that genuinely reduces teacher workload

What we learned

AI is most effective when used as an assistant, not a decision-maker

Clear rubrics greatly improve AI grading accuracy

Teachers value transparency and control over automation

Education tools must prioritize trust and reliability

What's next for Co-Teacher

Multi-language support

Plagiarism detection

LMS integrations (Moodle, Google Classroom, etc.)

Analytics dashboards for student performance

Pilot testing with real teachers and institutions

Built With

• javascript
• react
• supabase