Tangent to a circle through a point not on the circle Student activity Play

Tangent to a parabola Student activity Play

Tangent to a parabola parallel to the given line Whiteboard exercise Play

Tangents Student activity Play

Tangents Simulation Play

Television Student activity Play

Television Slideshow Play

The birth of a star Student activity Play

The birth of a star Whiteboard exercise Play

The bisector of a line Whiteboard exercise Play

The bisector of a line Student activity Play

The bisector of a line Whiteboard exercise Play

The centre and the radius Animation Play

The centre and the radius of a circle Student activity Play

The circle as a locus Animation Play

The circumcentre of a triangle Student activity Play

The circumcentre of a triangle Whiteboard exercise Play

The coordinates of the marked points Whiteboard exercise Play

The coordinates of the vertex of a parabola Animation Play

The correlation coefficient Student activity Play

The correlation coefficient Animation Play

The diameter of the tree Animation Play

The distribution of the rational numbers over the number line Animation Play

The emission and absorption of photons Student activity Play

The equation describing the line Whiteboard exercise Play