If you are preparing for your A Level exams in June, you should be making use of past papers, and if possible mark schemes as well. Using past exam papers is one of the most effective ways to revise and prepare for an exam. It is the most focused way of working what you know and what you don’t know. Hopefully, you can find a teacher / examiner who is able to give feedback on the work that you do.
AQA Exam Papers
AQA have AS and A2 Papers from the past 3 years, available in pdf form. [AQA Past papers at AQA.org.uk]
Edexcel Exam Papers
Edexcel have past papers which you can download. Edexcel past papers
OCR Past Papers
Past Papers at OCR [OCR Past papers]