The equation of a circle with centre at an arbitrary point Student activity Play

The equation of the circle with centre at an arbitrary point Whiteboard exercise Play

The flower for Yoko Animation Play

The focal length and the shape of a lens Animation Play

The focal point of a concave mirror Student activity Play

The focal point of a concave mirror Animation Play

The graph of the tangent Student activity Play

The hidden patterns Animation Play

The image of the black shape Whiteboard exercise Play

The image of the blue shape Whiteboard exercise Play

The image of the red shape Whiteboard exercise Play

The image of the yellow shape Whiteboard exercise Play

The inner structure of the atom Student activity Play

The keyhole Whiteboard exercise Play

The line that was used in the symmetry Whiteboard exercise Play

The one-sided shapes Simulation Play

The pressure exerted by a liquid column Student activity Play

The properties of gases Student activity Play

The properties of liquids Student activity Play

The properties of matter Whiteboard exercise Play

The relationship between gravitational acceleration, the shape of the Earth and its rotational motion Student activity Play

The same shapes of the graphs Whiteboard exercise Play

The second derivative of an arbitrary rational power of  x Whiteboard exercise Play

The separation and recombination of linked genes Slideshow Play

The shape and colour of maze seeds Whiteboard exercise Play