Starter and main worksheet on working with density, mass and volume. Includes unit conversions, working with the formula triangle and calculations to find missing mass, density and volume. The starter can take the form of a class discussion to deepen understanding of the density formula. An extension at the end of the worksheet involves the calculations of volumes and working with missing lengths. Answers provided.

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.