A block on a disc Whiteboard exercise Play

A disc and a weight Animation Play

A disc containing n lattice points Animation Play

A disc in the coordinate system Animation Play

A rod cell's signal-transduction pathway Slideshow Play

A story of three goats Student activity Play

Circles and discs Student activity Play

Circles and discs Slideshow Play

Compact disc Slideshow Play

Coordinate geometry of a circle Class activity Play

Coordinate geometry of a circle Whiteboard presentation Play

Discs in the coordinate system Student activity Play

Erythrocytes – red discs Whiteboard exercise Play

Finding the number of common points of the coordinate axes and the disc Whiteboard exercise Play

Goats Whiteboard exercise Play

Lattice points on a disc Student activity Play

Lattice points on a disc Simulation Play

Light absorption by rhodopsin – the formation of a nerve impulse Student activity Play

Mirror symmetry Animation Play

Playing with a mirror Student activity Play

Reflection symmetry in the coordinate system in the lines x = a and y = b Student activity Play

Reflection symmetry in the vertical and horizontal lines Whiteboard exercise Play

Shapes that have rotation symmetry Student activity Play

The common points of the disc and the axes Animation Play

The common points of the disc and the coordinate axes Student activity Play