This book guides elementary teachers in breaking away from past practices and collaboratively embracing five essential paradigms (collaboration, instruction, content, assessment, intervention to successfully implement the CCSS for mathematics. The comprehensive resource for k-2 teachers offers: straight forward description of the five essential paradigms, practical guidance for forming and sustaining collaborative teams in a professional learning community culture, dozens of tools, resources, activities, examples, and reproducibles to help teams analyze and interpret the standards.