This close-up look at the structure and content of the Common Core high school mathematics standards is designed to kick off implementation at the classroom level. Teachers will find information on how the mathematical content and practice standards work together across conceptual categories, domains, and grade bands to prepare students for the next level of study, college, or career; practical guidance on lesson planning, including a process for making the best use of the effective instructional strategies explored in Classroom Instruction That Works, 2nd ed.; and sample lessons that illustrate how to approach content likely to be new to their curriculum.