There are full sets of AS Level and A Level specimen papers, practice papers and past papers available from Teach Cambridge.
Each year the previous year’s AS and A Level past papers, mark schemes, examiners reports and candidate exemplars are released on the public qualification webpages at the beginning of August. This is to allow all candidates, including those taking the examinations as private candidates, access to these materials prior to each year’s exam series.
OCR’s ExamBuilder is an online service that allows teachers to build their own assessments using a bank of reformed and legacy Chemistry B (Salters) questions from the June 2014 series up to the most recent but one reformed assessment series. You can register to create your own OCR ExamBuilder account at www.ocr.org.uk/qualifications/past-papers/exambuilder/