The ratios of more than two quantities Student activity Play

The resistance of a wire Animation Play

The resistance of a wire and its dimensions Student activity Play

The resistance of a wire and its dimensions Simulation Play

The rhombus Student activity Play

The rhombus and the circle Student activity Play

The rhombus and the circle Whiteboard exercise Play

The same force – different effects Animation Play

The same units Animation Play

The second tangent theorem – equality in length Whiteboard exercise Play

The second tangent theorem – equality in length Student activity Play

The shorter way Animation Play

The sides of isosceles triangles Student activity Play

The sides of the triangles – trigonometric ratios for selected angles Whiteboard exercise Play

The size of the image and the focal length of a mirror Simulation Play

The size of the image and the focal length of a mirror Whiteboard exercise Play

The size of the image and the focal length of a mirror Student activity Play

The Solar System Whiteboard presentation Play

The space diagonal of a cube Animation Play

The space diagonals of a cube Student activity Play

The speed of light Student activity Play

The square inscribed in a circle Whiteboard exercise Play

The standard index form on the calculator display Student activity Play

The stretching of a spring Animation Play

The sum of powers of 10 Simulation Play