What do the educational standards entail?
Common Core is intended to cover fewer topics in greater depth at each grade level. In English language arts, the Common Core State Standards require certain content for all students, including: Classic myths and stories from around the world; America’s Founding Documents; Foundational American literature: and Shakespeare. The remaining decisions about what content should be taught are left to state and local determination. In addition to content coverage, the Common Core State Standards require that students systematically acquire knowledge in literature and other disciplines through reading, writing, speaking, and listening.
In Mathematics, the Common Core State Standards lay a solid foundation in: whole numbers; addition; subtraction; multiplication; division; fractions; and decimals. The middle school and high school standards call on students to practice applying mathematical ways of thinking to real world issues and challenges in an attempt to prepare students to think and reason mathematically.
http://blog.acton.org/archives/64476-explainer-common-core.html