Straight lines and half-planes Student activity Play

Symmetries with respect to parallel lines Student activity Play

Symmetries with respect to parallel lines Whiteboard exercise Play

Symmetries with respect to two perpendicular lines Whiteboard exercise Play

Symmetries with respect to two perpendicular lines Student activity Play

The angle between the conductor and the field lines Whiteboard exercise Play

The angle between the conductor and the field lines Student activity Play

The angle between the conductor and the field lines Simulation Play

The angle between the conductor and the field lines Animation Play

The angle between two lines Animation Play

The attraction of iron filings by magnets Animation Play

The correct perpendicular lines Whiteboard exercise Play

The family of lines Student activity Play

The family of lines Whiteboard exercise Play

The family of lines y = 2x + c Animation Play

The field lines for two point charges Animation Play

The formation of species – Darwin's finches Student activity Play

The lines of symmetry Whiteboard exercise Play

The magnetic field around a conductor Whiteboard exercise Play

The magnetic field around a conductor Student activity Play

The National Grid system Whiteboard exercise Play

The National Grid system Illustration Play

The National Grid system Animation Play

The National Grid system Student activity Play

The origin of spectral lines Animation Play