On walking into a mature forest you see a snapshot of tree development. There are seedlings, saplings, young trees, mature...

Teaching Guidance 11-14

The speed of light, in metres per second, is one of those huge numbers that is occasionally thrown up in science and that can...

Teaching Guidance 11-14

Pupils are invariably fascinated by the links which can be made from the speed of light to distances across space, and travel...

Teaching Guidance 11-14

Pupils need to differentiate between the speed of sound in air and the speed of light in air.

Teaching Guidance 5-11 11-14

On the one hand pupils are quite prepared to accept that light can travel 150 million kilometres from the Sun to the Earth and...

Teaching Guidance 11-14