Essential Maths is a series of nine books for use in Years 7, 8, and 9. The books provide full coverage of the requirements of the National Curriculum. Essential Maths Book 8S has been written for pupils in Year 8 who are working within the National Curriculum Level 3–5 Tier. The series provides a wealth of carefully graded questions to stimulate an interest in mathematics, differentiated exercises on topics to encourage consolidation and provide challenge, pupil self-assessment points throughout the book, a focus on mathematical themes from the past, a selection of puzzles, investigations and mental arithmetic problems, and numerical answers in separate books.