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Cô Trân AI

Cô Trân AI

The AI teaching assistant that grades handwritten math homework

Students photograph their work. Claude reads every line, finds the exact step that went wrong, and drafts feedback in Vietnamese. Tutors review and approve.

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Solve for x: 3x - 5 = 10
  • 3x - 5 = 10Chép đúng đề bài.
  • 3x = 10 + 5Chuyển -5 sang phải thành +5 đúng.
  • 3x = 1510 + 5 = 15, tính đúng.
  • x = 415 chia 3 bằng 5, không phải 4. Em tính nhẩm sai ở bước cuối.
Score: 7/10

Grading takes hours. Feedback arrives late.

Vietnamese math tutors collect homework as phone photos. Marking each page by hand eats evenings, so students wait days to learn what they got wrong.

How it works

  1. 01

    Student photographs homework

    No app to learn. A photo of the notebook page is enough.

  2. 02

    Claude reads it step by step

    Vision reads the handwriting and checks each line of reasoning against the problem.

  3. 03

    Tutor approves Vietnamese feedback

    The tutor edits or approves before the student sees anything.

See it grade real handwriting

Pick a sample to see Claude's step-by-step grading.

Samples are synthetic handwritten solutions with deliberate errors. Results shown are recorded Claude output, not a live call.

Already running with real students

Cô Trân is a live tutoring platform, not a mockup.

Open the live product

Why Claude

  • Handwriting vision

    Reads messy notebook photos, including math notation.

  • Step-level reasoning

    Finds the first wrong line, not just a wrong final answer.

  • Vietnamese output

    Feedback tutors and parents can read as written.

Roadmap

  1. Tutor review queue
  2. Error-pattern analytics per student
  3. Parent progress reports

Built by

Theon Tran, Senior Software Engineer, building tools for Vietnamese tutors. Also shipped Budgify, a shared household budgeting app.

See Budgify

Join the waitlist

Tutors, centers and parents: get early access.