This resource guides high school teachers in breaking away from past practices and collaboratively embracing five essential paradigms (collaboration, instruction, content, assessment, and intervention) to successfully implement the CCSS for mathematics, This comprehensive resource for high school teachers offers: straight forward descriptions 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.