Excellent preparation for the linear and modular mathematics GCSE specifications offered by AQA, Edexcel and OCR. Higher transition is for students who have followed any 'core' course in key stage 3 and need to cover or revise basic topics before they start Higher 1 (the first of the two main Higher tier books). To help teachers identify material that can be omitted by some students - or just dipped into for revision or to check competence - chapter sections estimated to be at national curriculum level 6 (or in a few cases level 5) are labelled as such.