CMDLearn: Free NCERT-mapped practice for Classes 1–10, 3 languages

We're building an AI tutor for India's government schools, Classes 1 to 10, in the child's own language. The tutor is still in testing, so we put the practice bank online first, free for anyone: 1,956 maths and science questions mapped to NCERT chapters, in English, Hindi and Marathi. Answers can be typed, tapped or written in words ('three by four', 'तीन चौथाई') and are marked by fixed rules in your browser, not by AI. No login, no cookies. There are also 115 printable worksheets with answer keys and 20 plain-language guides for parents and teachers. The questions were drafted with AI help and every answer is re-computed by tests. Practising teachers are still reviewing them, so please tell us what's wrong.