Extension task on direct proportion that presents harder questions including connecting proportion to other formulae in GCSE.

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.

Starts off with basic (but creatively written!) compound interest questions, before moving on to some difficult multi-step questions on percentages. Answers provided.

Extension task finding averages from tables. Answers provided.

Worksheet that guides students through the derivation of index-law properties of e^x from the MacClaurin series. Answers provided.