The first tangent theorem – perpendicularity Whiteboard exercise Play

The first tangent theorem – perpendicularity Student activity Play

The general form of the equation of a straight line Student activity Play

The gradient of a line Student activity Play

The gradient of a line Whiteboard exercise Play

The gradient of a line perpendicular to the  x-axis Animation Play

The path of a charge moving perpendicular to the filed lines Animation Play

The perpendicular bisector Simulation Play

The perpendicular bisector Whiteboard exercise Play

The perpendicular bisector Student activity Play

The perpendicular bisector in a circle Animation Play

The perpendicular bisector of a line segment Animation Play

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

The perpendicular bisectors Simulation Play

The points on a straight line Animation Play

The scalar product (1) Class activity Play

The scalar product (2) Whiteboard presentation Play

The scalar product of parallel and perpendicular vectors Whiteboard exercise Play

The scalar product of parallel and perpendicular vectors Student activity Play

The standard and the general form of the equation of a straight line Animation Play

Tools that involve moment Whiteboard exercise Play

Transformations Class activity Play

Transformations Whiteboard presentation Play

Transverse and longitudinal waves Student activity Play

Transverse and longitudinal waves Animation Play