Book excerpt: This third edition of Beta Mathematics is written for Level 5 Mathematics and Statistics in the New Zealand Curriculum. The content matches the three curriculum strands: Number and Algebra, Geometry and Measurement, and Statistics. As a key component in the only current New Zealand-written secondary mathematics series, Beta Mathematics is rich in cross-curricular applications, which are always grounded in a New Zealand context. The mathematical activities are designed to relate to the students¿ own experiences.