Traditional curriculum and teaching practices are antiquated, do not address the educational needs of students, and are inconsistent from district to district, school to school, and classroom to classroom. This inequity has caused many students to miss out on the opportunity to learn vital knowledge. Common Core Mathematics in a PLC at Work¿, High School gives teachers the tools to effectively offer mathematics instruction and address the Common Core State Standards (CCSS) for mathematics challenge: All students successfully learning rigorous standards for college or career preparatory mathematics. Much of the material series editor and author Timothy D. Kanold and authors Gwendolyn Zimmermann, John A. Carter, and Mona Toncheff present in this book, and the Common Core Mathematics series, has been part of the national discussion on mathematics reform and improvement since the National Council of Teachers of Mathematics¿ (NCTM) release of the Curriculum and Evaluation Standards in 1989. This book provides a teacher-focused guide to teaching and learning mathematics in high school. The five chapters focus on the five fundamental areas (collaboration, instruction, content, assessment, and intervention) required to prepare every teacher for successful implementation of CCSS for mathematics.