index · 3 published · 2 planned
Topics
Each one is a sequence of steps. Read in order, or follow the arrows back to what you need first.
How they connect
prerequisite.maphover or focus to trace
- 01Quadratic EquationsFrom the shape of a parabola to the formula that finds its roots: what a, b and c each control, and what the discriminant tells you.core · 7 steps
- 02Sine and CosineThe wave behind sound, light and the logo on this page: amplitude, frequency, phase and midline, one parameter at a time.core · 5 steps
- 03Derivatives as SlopeStart from the slope of a line, squeeze two points together, and watch the tangent and the derivative appear.advanced · 4 steps