Develop your students' grade-level mathematical reasoning and problem-solving skills. Discover how your collaborative team can ensure all students learn grade-level mathematics during Tier 1 and Tier 2 instruction. This valuable guide provides preK-12 teachers with ready-to-use tools and strategies to help students communicate using mathematical language and develop number sense, conceptual understanding, procedural fluency, mathematical reasoning, problem solving, and more. PreK-12 educators can use this book to: (1) Collaborate with teams to build a shared understanding of essential mathematics standards; (2) Ensure students learn grade-level mathematics during Tier 1 and Tier 2 instruction; (3) Learn how to help students make connections to prior learning and why that matters; (4) Create opportunities for students to reason through problems with their peers; and (5) Develop students' number sense, procedural fluency, and other key mathematics skills.