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 core of a transformer Student activity Play

The core of a transformer Illustration Play

The correlation coefficient Animation Play

The correlation coefficient Student activity Play

The diameter of the tree Animation Play

The discovery of X-rays Whiteboard exercise Play

The discovery of X-rays Student activity Play

The distance between the plates Student activity Play

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

The Earth's field Animation Play

The Earth's magnetic field Animation Play

The Earth's magnetic field Whiteboard exercise Play

The Earth's magnetic field Illustration Play

The Earth's magnetic field Student activity Play

The electric field inside a capacitor Animation Play