Chalk Talk

Chalk Talk is a tutor that teaches on a chalkboard that draws itself. A student types a question ("How do volcanoes erupt?") or drops in a photo of a textbook diagram, and about two minutes later gets a 6–8 scene lesson. Every scene is painted, and each part (the magma chamber, the vent, the ash cloud) is traced in chalk, coloured in and labelled at the exact moment the tutor says its name. The problem it solves: textbooks explain a diagram in one place and show it in another ("see Figure 4.6 on page 112"), and notes or flashcards can't point at anything. I run Laxu AI, which turns students' PDFs and photos into notes, flashcards and quizzes, and I saw that notes let students read about a process but not see it. Diagrams are where they get stuck. During a lesson the student can raise their hand (press H) and ask out loud, and the answer is drawn on the scene they're looking at. At the end, a "Find it" round asks them to tap each part on the picture; a wrong tap shows where it really is. "Snap your textbook" runs the same kind of lesson on the student's own photo, tracing the real parts on their page. A lesson costs 16–23¢ of API credit to make. Everything in the repo was built during the hackathon.