This book explores the factors that influence young people's learning of mathematics. It uses a holistic, socio-culturally informed approach to show how all young people can be encouraged to engage with and learn mathematics. Rich examples from classroom practice are used to connect theory and practice. The role of mathematical tools, including information and communications technologies, is discussed. A key focus of the book is the link between teaching and learning, including different ways in which teachers can design and orchestrate mathematical learning environments. This important, accessible and relevant book is essential reading for student teachers of mathematics as well as all qualified mathematics teachers in secondary schools. The table of contents presents the following chapters: (1) Teaching, Learning and Mathematics; (2) Cultures of Mathematics Education; (3) Ways of Knowing Mathematics; (4) Ways into the World of Mathematics; (5) Teaching and Learning as Reciprocal Activity; (6) Digital Tools for Learning Mathematics; (7) Designing Environments for Learning; (8) Designing for Learning; (9) Learning Geometry; and (10) Theory as a Way of Seeing.