The lines of symmetry Whiteboard exercise Play

The magnetic field around a straight wire Student activity Play

The magnetic field around a straight wire Whiteboard exercise Play

The normal Whiteboard presentation Play

The normal Class activity Play

The notion of a half-plane Whiteboard exercise Play

The notion of a half-plane Student activity Play

The number line Whiteboard exercise Play

The number of car accidents Animation Play

The origin and 'something' Student activity Play

The origin of spectral lines Animation Play

The perpendicular bisector Student activity Play

The perpendicular bisector of a line segment Animation Play

The perpendicular bisector of a line segment – a reminder Student activity Play

The points on a straight line Animation Play

The price of a ball-pen Whiteboard exercise Play

The price of petrol Whiteboard exercise Play

The ranges of radio waves Animation Play

The red line Whiteboard exercise Play

The relationship between change in the direction of movement and force Student activity Play

The scalar product (1) Whiteboard presentation Play

The second tangent theorem Animation Play

The second tangent theorem – equality in length Student activity Play

The second tangent theorem – equality in length Whiteboard exercise Play

The shortest route to a line Student activity Play