This fantastic CGP Revision Guide has the Grade A*-G WJEC GCSE Science Double Award course completely covered! Every topic is explained in our straightforward style and it's packed with examples - plus material that's only required for the higher exam is marked up. We've included practice questions at the bottom of each page with full answers at the back. What's more, there are revision summaries at the end of each unit and sections on Working Scientifically and Practical Skills. To top it off, there's a free Online Edition of the whole book - just use the unique code printed inside the cover to access it on a PC, Mac or tablet.