Amazon.com description: Product Description: Endorsed by Cambridge International Examinations, 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 syllabus. The workbook supports and supplements the student book, providing summary notes for the theory required, extra questions for students to practice and apply the skills and knowledge they have gained, and space for pupils to write their answers in.