Manipulatives Gallery

Sort the worksheet's scenarios into supervised / unsupervised / reinforcement — then flip a "what if" switch and watch the right answer change.

The 20-row sandwich table three ways: numbers only → with labels → with labels and item names.

Six word problems demonstrated as a graph, a formula, a table of values, and a plain sentence with real units. Adjust one format and observe the others change accordingly

Separate healthy from not-healthy sandwiches with a line — then state the inequality and count your misses.

The scary Σ formula as fifteen tiny same-or-different questions, tallied one cell at a time.

A self-hosted stand-in for Teachable Machine: draw examples, train, test on held-back data, read the accuracy matrix — and see exactly why it decided.

Two points, three answers: walk the grid (L1), cut straight across (L2), or take the biggest single step (L∞). Then switch modes and see the circle each ruler draws — a diamond, a circle, a square.

Drag anything — squares, circles, the star. Change k, switch rulers. The vote, and the answer, moves.

Fit sleep-vs-scores by eye, watch the squared misses, then reveal the best fit. Then: which curve should fit an ice-cream year?

Twelve plants, three markers, and no demonstration: you claim every plant for its nearest marker, walk each marker to its group's balance point, and repeat until nothing moves. Every half-step is marked right or wrong. Then start it somewhere else and find out that the answer moves too.

You are 16 ratings. No scatterplot anywhere — the math never needed one.

Four possible worlds, one broken promise. The contrapositive never disagrees; the converse fools you.

Play the paper rounds first — then check yourself, one named rule per step.

Score the endings yourself, back the values up, and find out if the draw is forced.

Ten commissions, one blank board: K₃, P₄, C₆, a tree on six vertices. Check my work — the board checks the shape, not just the degrees, and you read your own graph.

The Shannon switching game against a computer that has solved every board. Claim edges to join A to B, or delete them to keep A and B apart. Two routes are not enough — find out why on the ring road.

Join the dots without ever crossing a line, and get paid for every clique you finish — 1 for the line, 3 for a triangle, 5 for a four. There is no prize for five, and the reason is planarity.