Written by a senior examiner, John Campton, this CCEA AS/A2 Biology Student Unit Guide is the essential study companion for Unit 3: Practical and Investigational Skills.This book includes all you need to know to prepare for your Unit 3 assessments: clear guidance on the range of practical apparatus and techniques that you need to know about and an overview of the scientific method of testing ideas by experimentation examiner's advice throughout, so you will know what to expect in the assessments and will be able to demonstrate the skills required sample investigation tasks for extra practice before your assessments