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Handwritten math marking

Upload a worksheet. Get clear corrections on the paper.

Tired of searching for your mistake? Today you can have it corrected on the page!

Example
Annotation colors Marks the first mistake Marks follow-on errors
Before Student work
Unmarked algebra expansion worksheet before review
After Annotated output
Annotated algebra expansion worksheet after review

Use a clear worksheet photo or scanned PDF. Pick several photos at once and they are marked as one paper, in filename order. Supported images are PNG, JPEG, WebP, HEIC, and HEIF.

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1 Upload

Select a completed worksheet, a scanned PDF, or several photos of one paper.

2 Review

Fresh mistakes are marked red; follow-on errors are purple.

3 Teach

Use the notes to explain exactly where the work changed course.

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Enter the shared pilot code to use the 1,000-generation pool.