From September to March concentrate on old-style A*-G papers because it's easier to identify topics to work on

Edexcel 1MA0 Foundation

Edexcel 1MA0 Higher

OCR J567 Foundation

OCR J567 Higher

From April to June concentrate on new-style 9-1 papers because they include longer, problem-solving type questions

Edexcel 1MA1Foundation

Edexcel 1MA1 Higher

OCR J560 Foundation

OCR J560 Higher