The combined material in the books for years 9 and 10 has been written to meet the needs of Stages 5.1, 5.2 and 5.3 of the NSW syllabus. The content is arranged in a sequential manner. Stage 5 outcomes are listed at the beginning of each chapter. These relate directly to syllabus requirements. To facilitate the continuum of the K –10 syllabus the outcomes from the previous stage ( stage 4 ) are also shown. Level 3:Where appropriate, more challenging questions have been included in exercises. These questions require students to apply concepts to unfamiliar situations, or demonstrate superior problem solving skills. Students who are able to complete most of these questions should have the necessary background to study the Mathematics Extension 1 course at stage 6.