Penmentor - Claude marks up your handwritten math like a teacher
A maths mentor at the tip of your pen. Press a key while you work by hand: Claude, Gemini or GPT marks your work on the screen like a teacher with coloured pens, gives you hints instead of answers, and shows the idea as a 3Blue1Brown-style animation. Handwriting in xournal++ → one key → the slip is marked on the page → box the integral → an interactive manim animation. ( video ; for a repeatable…
Claude is an AI tool that can mark up your handwritten math work like a teacher, offering hints and interactive animations to help you learn calculus. By pressing a key while working on paper, Claude, Gemini, or GPT can provide feedback directly on your screen, highlighting mistakes, ticking correct lines, and showing fading animations of the next steps.
This innovative approach, called Penmentor, allows you to practice and recall information as you write, with the marks staying visible until you clear them. Penmentor is a small plugin that integrates with xournal++, a program for writing and annotating notes, enabling users to experience the benefits of an interactive AI tutor while working on their own systems.
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