A one-page knowledge organiser for A Level Maths differentiation: key definitions, the rules and formulas, a worked example, common mistakes and a “you should be able to” list.

For Year 12 and Year 13 students revising differentiation, and for teachers who want a summary sheet to give out at the end of the topic.

In class: use it as a revision mat, or cover one section and ask students to rebuild it from memory before checking.

The web version, with practice questions, is free at .