A biconvex lens Animation Play

A circle and a point Student activity Play

A circle and a point Whiteboard exercise Play

A circle and a straight line Student activity Play

A circle and a straight line Whiteboard exercise Play

A curve intersecting itself Animation Play

A family of transition metals Animation Play

A full angle Whiteboard exercise Play

A function – reminder Student activity Play

A game in the coordinate system Student activity Play

A half-plane bounded by a line Animation Play

A hole in a piece of paper Animation Play

A ladybird Whiteboard exercise Play

A ladybird's trip Whiteboard exercise Play

A ladybird's trip Student activity Play

A lens Class activity Play

A lens Whiteboard presentation Play

A line and a circle Student activity Play

A line and a point of symmetry Animation Play

A linear function Animation Play

A linear function  y = ax + b Whiteboard exercise Play

A linear function  y = ax + b Student activity Play

A mirror and a light bulb Animation Play

A mirror and a light bulb Student activity Play

A mirror and a light bulb Simulation Play