The Common Core State Standards (CCSS) for Mathematics are curriculum standards that describe the mathematics skills and concepts students need to develop for success in higher education and the 21st-century workplace. This book from the Center for Gifted Education provides gifted and advanced learners challenging activities to master and engage with the CCSS for mathematics. The lessons cover mathematics content for grade 6, including ratios and proportional relationships, the number system, expressions and equations, geometry, and statistics and probability. Activities and practice problems enrich and extend current grade-level mathematics content. Each lesson follows a predictable structure and includes a teacher page that outlines the CCSS and mathematical practices covered, estimated time, key terms, materials, and objectives; a challenging activity to allow students to explore the concepts in depth; practice problems; and an assessment similar to CCSS-based grade-level standardized assessments.