This DIGITAL ONLY version of Maths in Focus 12 Extension 1 has been rewritten and updated to cover the new senior mathematics courses: Mathematics Advanced and Mathematics Extension 1 and 2. Each chapter begins with a Chapter Outline that includes a list of objectives and a Terminology glossary and graded exercises include multiple-choice questions, HSC-style questions and realistic applications. Investigations explore the syllabus in more detail, providing ideas for research projects and modelling activities, while Did you know? sections contain interesting facts and applications of the mathematics learned in a chapter. The student book specifically highlights the Mathematics Extension 1 content and includes syllabus grids and codes, answers and an index to meet the new 2019 senior maths course requirements.