Full lesson with starter, powerpoint and worksheet on the university-level topic of Countability. Great for an extension lesson with a bright set that is motoring through the GCSE syllabus.

An extension lesson which introduces basic group theory (without the formalisation) applied to symmetries of a square. Cut-outs provided: students should stick pairs of squares back-to-back so that the numbers line up on either side. Answers to the worksheet also provided.

Starter and main worksheet on pressure, force and surface area. Answers provided.