K3 — Average Speed and Velocity
A car does the first half at 20 km/h and the second at 60. Almost every student answers 40, and it is wrong — because half the time and half the distance are different journeys.
Kinematics
Kinematics describes motion without asking what causes it. Sixteen parts covering position and frames, graphs, constant and variable acceleration, projectiles, relative motion, constraints and circular motion — each building on the mathematics of Module 1 rather than repeating it. Start with K1 and work in order the first time.
K2 — Drawing Physics
A diagram is not a picture of the situation. It is a set of physical claims, and every arrow on it can be wrong — which is why a reversed arrow does more damage than a mistyped coefficient.
K1 — Frames, Position and Displacement
There is no absolute rest. Every statement about motion carries a frame, whether or not anyone mentions it — and the difference between moving the origin and changing the frame decides what stays the same.