A different form of the equation of the circle Animation Play

A different sound Student activity Play

A different way of calculating the mean Animation Play

A different way of numbering groups in the periodic table Animation Play

A differential equation with separable variables Animation Play

A diode acting as a rectifier Student activity Play

A diode acting as a rectifier Simulation Play

A diode acting as a rectifier Whiteboard exercise Play

A diode and an alternating current Student activity Play

A diode and an alternating current Whiteboard exercise Play

A diode in a bike Student activity Play

A diode in a bike Animation Play

A diode in a bike 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 domino and a coin Animation Play

A double bond Animation Play

A double bond in ethene Animation Play

A drop of a parcel Animation Play

A fake force gauge Animation Play

A family of transition metals Animation Play

A figure Student activity Play

A figure Simulation Play

A figure Animation Play

A figure Animation Play

A figure Whiteboard exercise Play

A figure surrounded by straight lines Student activity Play

A figure surrounded by straight lines Whiteboard exercise Play

A figure under reflection in the coordinate system Animation Play