Jinboost

Bar Model Tutor is a live, interactive voice-led maths lesson for Singapore primary pupils (P3–P6), built by a father for his daughter. Singapore schools teach every word problem with a bar model, but most parents learned algebra: we can get the number, not the picture, and answer apps just finish the homework. A parent signs in and adds their child. The child snaps or types a word problem. While Muse Spark plans, the teacher's voice already reads the question and marks its numbers. Then a whiteboard draws the bar model step by step and stops to ask the child at every step. The child answers by voice or by building the bars on the board. Code checks every answer against a verified plan; a wrong answer gets a hint, not the answer, and the answer only appears after the child has tried. The child's progress per method shapes the pacing of the next lesson. Every plan is a structured BarSpec that code solves and checks, and a second Meta model must agree, or the tutor declines rather than teach a wrong answer. Showcase (videos, slides, docs): https://jinboost--barmodel.modal.run/showcase Try it: https://jinboost--barmodel.modal.run