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Geometry
11 apps to play — grouped by age.
🎈 Ages 6–8 · Grades 1–3
🎒 Ages 9–14 · Grades 4–8
VoxelForge
Ages 9–13 · Gr 4–8 Level 3
Turn 3-D shapes in your head and build them block by block — spot the true rotation (turned, not flipped) and stack a shape one flat layer at a time. A hands-on spatial-reasoning lab. Ages 9–14.
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FunctionForge
Ages 12–13 · Gr 7–8 Level 4
Step into the function workshop: feed numbers into a machine, watch what comes out, and crack the hidden rule. Build y = mx + b on a coordinate grid to match a target line, read slope and intercept off a graph, and try the vertical line test — then practice functions, tables, expressions, and pre-algebra across 16 kits. On-device; works with the sound off.
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GeometryForge
Ages 11–13 · Gr 6–8 Level 3
Make angles with a live protractor, build polygons and reason about their angle sums, slide/flip/turn shapes on a grid, find lines of symmetry, and stretch a geoboard to an exact area — plus 17 kits of geometry.
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BridgeForge
Ages 10–12 · Gr 5–7 Level 3
Build bridges between math and everything else. Match a math idea — ratio, symmetry, rate, probability — to the real-world moment in art, music, science, sport or code that actually uses it. Plus cross-curricular Concepts checks. Ages 9–14.
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MasteryForge
Ages 12–13 · Gr 7–8 Level 5
Adaptive math practice that picks your next problem at the edge of what you know — extend, consolidate, or stretch — across fractions, geometry, functions, and more.
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FlickForge
Ages 9–13 · Gr 4–8 Level 3
The physics of the flick, for ages 9–14: predict where a struck disc will come to rest — after it banks off a rail (angle in = angle out), slows to a stop (friction), or passes its momentum to another disc (the carrom strike). You call the landing band, then the deterministic sim reveals the path so you can reconcile. Plus a free table to experiment on. On-device; nothing leaves your device.
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CreaseForge
Ages 10–13 · Gr 5–8 Level 4
Every time you fold a piece of paper, you are doing geometry: the crease is a mirror, and whatever was on one side lands as its reflection on the other. Fold across a line and a dot mirrors straight over it; fold one edge onto another and you bisect the angle exactly — no protractor. Predict where a fold lands, then mirror a point yourself in the lab. Real, tiny, deterministic maths — no internet. Ages 9–14.
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🎓 Ages 15–18 · Grades 9–12
VectorForge
Ages 15–18 · Gr 9–12 Level 5
Linear algebra you can see, for ages 15–18. A 2×2 matrix is a transform of the plane — rotate, stretch, shear, reflect, flatten. Predict where a point lands, then watch the matrix move a shape: the determinant is how much it scales area, and the eigenvectors are the directions that don’t turn. It’s the on-ramp to the maths behind AI — a matrix is a neural layer. On-device, exact arithmetic.
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CalcQuest
Ages 15–18 · Gr 9–12 Level 5
Predict the limit, the slope, the area — then a real engine computes it and shows the rule. Precalc into calculus, made intuitive. For teens.
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LocusForge
Ages 15–18 · Gr 9–12 Level 5
Conjecture the angle, the length, the area — then a real engine confirms it and names the theorem that proves it. Formal geometry, made intuitive. For teens.
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