Circle Theorems - not only a topic hated by my students but also by me! The diagrams in the "Toolbox" (key information) are really clear. The worked example is similar to questions found on GCSE papers and clearly indicates the way to work through it - complete with the necessary words that examiners will be looking for e.g. "alternate segment theory"Lots and lots of practice questions and not too much reading for students - good way for them to learn - just reading pages of instructions simply doesn't work. Helpful indicators in the margins stating if the questions are "Exam Style" or to practise "Reasoning".I love this series - clear books without horrible "What did you learn in this unit" questions that students really hate!