Endorsed by Edexcel Written by examiners involved in the development of the specifications and assessment Flexible materials cover all the needs of single and double awards at AS and A Level. Examples really show how to achieve success in internal and external assessment . Photocopiable Teacher's Guide provides essential guidance and suggested answers.Each unit contains: Information which comprehensively covers the 'what you need to learn'sections of the Edexcel specification; Examiner's guidance showing how to meet external and internal 'assessment criteria'; Practice research tasks; Portfolio-style activities; Examination - type questions.