Interactive math, one idea at a time.
A small set of activities to explore, predict, and build the ideas we're working on in class. Pick one and dig in — each is self-contained and works on your phone or Chromebook.
Balance the Equation
Solve for x by doing the same thing to both sides — one careful step at a time, with a balance you can watch and a history you can rewind.
Growing Tile Patterns
Figure out the rule behind a growing pattern of tiles, then write it as an explicit and a recursive equation. The colors are a hint.
Guess the Function
Is it linear, quadratic, or exponential? Read the table, graph, tiles, and equations — hide the ones you don't need — and make the call.
Filling Flasks
Fill flasks of different shapes at the same rate and watch the height-vs-time graph draw itself. The curve is the shape of the flask.
Domain & Range
Drag across a graph to mark domain, then range. Open circles, arrows, tables, and an inverse switch — with axes labeled as real quantities.
Algebra Tiles
A free board of x², x, and 1 tiles, positive and negative. Drag, rotate, snap to the grid, zoom and pan, multi-select, copy and paste — and watch the expression update.
Meet e and ln
What the number e is, how continuous growth compares to compound growth, why ln is just log base e — and how ln undoes e. Four practice problems at the end.
Why the Log Rules Work
Three log rules, three explanations each — but only one of them holds up. Find the flaw in the other two using base, argument, and exponent.
Quadratic Formula Coach
Name a, b and c, fill in the formula, then work it one highlighted step at a time — checking each step as you go. Guided, on-your-own, and calculator modes.