Building Number Sense clearly articulates the Common Core State Standards and provides instruction and intervention ideas through RTI delivery models. The authors detail fun and exciting ways for students to learn mathematics, especially in areas where students struggle the most. Each strategy is grounded in research-supported mathematics instruction with aligned assessments to ensure student comprehension. Complete with classroom examples and reproducible materials for intervention and assessment, this book will help teachers successfully instruct and assess mathematics in the K-3 classroom. The book includes: Up-to-date research and best practices for early childhood mathematics instruction and intervention Figures and tables to illustrate key concepts Quick tips and reproducible forms to help educators implement the strategies For administrators, the book provides instructional checklists to help improve early mathematics at the school and district level.