StudentChoose a mission, make a prediction, test the model, then explain the evidence.TeacherLook for misconception tags, evidence-step completion, and transfer-readiness signals.
Division Lab
band 3-5 · mission — · seed —sharing · fitting
Missions
Invariant witness
dividend—
divisor—
check—
a / b asks how many b fit in a; the fit is drawn, counted, and checked by quotient x divisor + remainder = dividend.
0 events
A sharing table and a fitting bar
Counters dealt into groups, or bars tiled along a bar. Division asks how many fit, and the check identity prints the proof. Commit a prediction before every deal.