Elfed Charles Author

Peter Blake is a former lecturer and senior lecturer in Chemistry at St Andrews and Cardiff Universities. He has been an examiner for A Level Chemistry for twenty five years, during which time he has been involved in both specification revision and the authoring of study materials. Elfed Charles has thirty years of experience teaching in secondary schools, has experience of senior management and is a Principal Examiner in Chemistry at A Level for a major awarding body. Kathryn Foster is a former Head of Science at a Sixth Form College. She has many years of experience teaching Chemistry A Level and is a Principal Examiner for Chemistry with a major awarding body.