Patrick Kivlin & Sue Pemberton 
Essential Mathematics for Cambridge Secondary 1: Stage 9 [PDF ebook] 

The Essential Mathematics for Cambridge Secondary 1 series has been created for the international student. Written by an expert author team with an experienced examiner it provides complete coverage of the previous Cambridge syllabus. The Stage 9 Student Book also covers some of the topics included at Cambridge IGCSE. Summary and review sections after each topic help students retain learning, while Checkpoint-style questions assist their preparation for assessment. The text provides extensive differentiation support with ‘Hints’ in the margins to guide middle to lower ability students through the more challenging aspects of the problem-solving and extension questions.