Mutual position of two circles and the distance between their centres Whiteboard exercise Play

Mutual position of two circles in the coordinate system Simulation Play

Mutual position of two circles in the coordinate system Student activity Play

Negative feedback mechanism Illustration Play

Nucleus – the information centre Animation Play

Points of intersection Student activity Play

Potential energy and the centre of gravity Student activity Play

Potential energy and the centre of gravity Whiteboard exercise Play

Properties of enlargements, part II Student activity Play

Quadratic model Whiteboard exercise Play

Quadratic model Student activity Play

Radio waves Student activity Play

Radius of inscribed and circumscribed circles Animation Play

Rotation Student activity Play

Rotation in the coordinate system Student activity Play

Ruler-and-compass constructions Class activity Play

Ruler-and-compass constructions Whiteboard presentation Play

Solving problems involving circles Whiteboard presentation Play

Solving problems involving circles Class activity Play

Solving problems using the tangent theorem Simulation Play

Solving problems using the tangent theorem Student activity Play

Speed of a satellite Animation Play

Spherical mirrors Animation Play

Spherical mirrors Student activity Play

Spherical mirrors Whiteboard exercise Play