The Language of Mathematics focuses on the substantive knowledge and relevant pedagogy required for preparing instructors to teach mathematics in K-12 school settings. The contents reflect current field-based research relevant to faculty in higher education as well as teachers in public school classrooms. The Language of Mathematics: How the Teacher's Knowledge of Mathematics Affects Instruction is timely and important. Research reported in the book sheds light on the knowledge needed to teach mathematics in ways that motivate and foster positive attitudes toward mathematics. The book may serve as a resource for mathematics teacher preparation courses.