Concepts practice

Pick a topic. Each round is a short set of questions with a picture-first explanation on every reveal — tap 🔊 to hear the question.

Rows × Columns — arrays and products 25 questions · grades 6-8 Flip — the order rule (commutative) 25 questions · grades 6-8 Break the Wall — the split rule (distributive) 25 questions · grades 6-8 City Lots — 2-digit × 1-digit with lots 25 questions · grades 6-8 Four Lots — 2-digit × 2-digit area model 25 questions · grades 6-8 Twin Lots — squaring and the doubled middle 25 questions · grades 6-8 Dreamer's Mistake — why 13×13 ≠ 100+9 25 questions · grades 6-8 Fill the Field — area vs perimeter 25 questions · grades 6-8 Snip Anywhere — the total stays the same 25 questions · grades 6-8 Doubles & Halves — friendly rewriting 25 questions · grades 6-8 Skip-count Streets — repeated addition 25 questions · grades 6-8 Hidden Lot — missing factors and division 25 questions · grades 6-8 Grid Race — mixed review 25 questions · grades 6-8 Estimate then Tile — size first 25 questions · grades 6-8 Paper Lots — area on grid paper 25 questions · grades 6-8 Tell Tila — explain the array (teach the cast) 25 questions · grades 6-8

Every answer is checked by a deterministic engine. On-device · no accounts · nothing leaves the device.