Mike Ollerton & Peter Sykes 
Getting the Buggers to Add Up [PDF ebook] 

The third edition of this bestselling book for teachers of secondary mathematics has been brought right up to date and benefits from an extra teacher voice. Together, the authors show how active learning and introducing an element of surprise can bring mathematics alive.
With a firm focus on problem solving, independent exploration, thinking skills and applying maths to real-life situations, this book contains new ideas, anecdotes and strategies including brand new chapters on functional mathematics, how to make best use of assessment, and teacher and curriculum development.
Brimming with useful tips and inspirational advice on every aspect of teaching, this book is essential reading for maths teachers at any stage of their career.