The enlargement of the triangle Animation Play

The equation of a circle with centre at an arbitrary point Simulation Play

The equation of a circle with centre at an arbitrary point Student activity Play

The equation of a circle with centre at the origin Student activity Play

The equation of the circle with centre at an arbitrary point Whiteboard exercise Play

The equilateral triangle Student activity Play

The equilateral triangle and the square Whiteboard exercise Play

The exact values Whiteboard exercise Play

The first tangent theorem – perpendicularity Student activity Play

The focal length and the shape of a lens Animation Play

The focal point of a concave mirror Animation Play

The focal point of a concave mirror Student activity Play

The focal point of a concave mirror Whiteboard exercise Play

The focal point of a concave mirror Simulation Play

The formation of an image by a spherical mirror Whiteboard exercise Play

The formation of an image by a spherical mirror Student activity Play

The formation of an image by a spherical mirror Simulation Play

The formula for the area of a triangle Animation Play

The formula for the space diagonal of a cube Whiteboard exercise Play

The formula for the space diagonal of a cube Student activity Play

The frequency of free oscillation Whiteboard exercise Play

The frequency of free oscillation Student activity Play

The frequency of oscillation of strings Slideshow Play

The future of the Universe Student activity Play

The greyhound and the hare Animation Play