New and updated features of this title Classroom-ready strategies UPDATED: Hundreds of problem-based activities model specific ways to engage students in doing mathematics. This edition includes more than 40 new activities. UPDATED: Teaching reasoning strategies in basic facts, whole numbers and fractions is covered in more depth in Chs. 9, 11, 12 and 15. UPDATED: Technology Notes reference new open-source software, apps and digital resources to use in teaching. Literature Connections list fun ways to use children's books to teach math, including 2 new lists for different reading levels on measurement and geometry. Learner-focused content NEW: Learning Progressions in each chapter offer guidance for planning units, understanding prior knowledge and future directions, and informing assessment development. NEW: Writing to Learn exercises ask readers to analyze and reflect on each chapter's big ideas. The exercises can be assigned or used to spark discussions in class.