A car moving at constant speed Animation Play

A caterpillar is going for a walk Whiteboard exercise Play

A caterpillar is going for a walk Student activity Play

A circle and a point Student activity Play

A clock in a rocket Student activity Play

A converging lens Animation Play

A graph of a linear function Animation Play

A graph tells the truth Student activity Play

A graph tells the truth Whiteboard exercise Play

A ladybird Whiteboard exercise Play

A ladybird's trip Whiteboard exercise Play

A ladybird's trip Student activity Play

A leaning tree Whiteboard exercise Play

A leaning tree Student activity Play

A light nanosecond Animation Play

A lighthouse Student activity Play

A lighthouse Whiteboard exercise Play

A magnifying glass Student activity Play

A magnifying glass Simulation Play

A magnifying glass Student activity Play

A magnifying glass Animation Play

A magnifying glass Whiteboard exercise Play

A microscope Whiteboard exercise Play

A microscope Student activity Play

A mirror and a light bulb Student activity Play