The Common Core State Standards (CCSS) provide a consistent, clear understanding of what students are expected to learn, so teachers and parents know what they need to do to help them. The standards are designed to be robust and relevant to the real world, reflecting the knowledge and skills that our young people need for success in college and careers. With American students fully prepared for the future, our communities will be best positioned to compete successfully in the global economy.
—Council of Chief State School Officers and the National Governors Association Center for Best Practices
The purpose of the Common Core State Standards (CCSS) is twofold: to ensure that all students are prepared for college and the work force and, to ensure consistency and quality throughout the educational systems across state boundaries.
The CCSS were built on existing state standards using specific criteria [PDF] and considerations [PDF]. They are research-based and include integration of best practices and education research from throughout the world. Teachers as well as other educational professionals contributed their expertise to develop the content and assessment of the standards (see lists of committee members at the National Governor's Association website [PDF]). Researchers from the early childhood, K-12, and higher education communities informed the development of the CCSS.
Appendices provide the rationale for developmental hierarchies in Mathematics [PDF] and English Language Arts and Literacy in History/Social Studies, Science, and Technical Subjects [PDF].