Exam Board: OCR. Level: AS/A-level. Subject: Chemistry. First Teaching: September 2015. First Exam: July 2016. Written by experienced author Mike Smith, this Student Guide for Chemistry helps you identify what you need to know with a concise summary of the topics examined in the AS and A-level specifications. It consolidates understanding with tips and knowledge check questions, provides opportunities to improve exam technique with sample answers to exam-style questions, develops independent learning and research skills, and provides the content for generating individual revision notes.