KS3 Maths Numeracy Strategy Workbook - Book 3, Levels 6-8 by CGP Books
This book is packed with maths questions for KS3 students covering all the topics in the Numeracy Strategy for levels 6-8. There are tips for some of the more difficult questions, and answers are at the back of the book. It's all written in CGP's straightforward style, with a sprinkling of humour here and there to break up the work!