Step through the math, one line at a time.

A guided, step-by-step way to learn a math concept: the tool evaluates a rule nail by nail and draws each chord as it goes, so the arithmetic and the geometry build up together — at your own pace.

[Phase 2 (last): the new STEAM Simulator component — graphing-calculator identity, KaTeX notation, the “Step Through the Algorithm” module — the per-step evaluation line in lockstep with the chord. The families-of-rules table is gated. Content per docs/STEAM/STEAM_simulator_page.md + CHANGES.]