For OCR’s teaching and learning resources scroll down this OCR page (or use the new design) and also this OCR (MEI) page (or new design).
I do like OCR’s check in tests for GCSE and I see check in tests and lesson elements on the A Level subject pages. This collection will grow.
You can read OCR’s Guide for the detail on the Check In tests each of which has 10 questions: Questions 1-4 are routine procedural questions and question 5-10 focus on the overarching themes: Mathematical argument, language and proof, Mathematical problem solving and Mathematical modelling. Questions marked with an asterisk are for students on the full two year A Level course.
With the resources from OCR(MEI) note the delivery guides. Each guide has a comprehensive list of free online resources.