Twenty-four illustrated lecture notes. Each teaches its topic in prose first — the rules, with worked examples — and then lets you run the derivation yourself, step by step, with the sūtra behind every step.
24 of 24 written. Paradigms and derivations are generated from the Aṣṭādhyāyī corpus, so the tables here and the reference site cannot disagree.
There is a second tier of twelve on how the grammar itself is built — read these first.