What is CCSS (Common Core State Standards)
CCSS (Common Core State Standards) are a set of academic standards in mathematics and English language arts/literacy that outline what students should know and be able to do at each grade level from kindergarten through 12th grade.
CCSS stands for Common Core State Standards. They are a set of rigorous, nationally consistent academic standards in English Language Arts (ELA)/Literacy and Mathematics for grades K–12, developed collaboratively by states beginning in 2009 and officially released in 2010. The Common Core represented the most significant effort in U.S. history to establish consistent academic expectations across state lines.
Background and Development
The Common Core was developed through the Common Core State Standards Initiative, led by the National Governors Association (NGA) and the Council of Chief State School Officers (CCSSO). The goals were to:
- Ensure all students — regardless of zip code — learn the same rigorous content
- Align U.S. standards with international benchmarks
- Reduce the massive inconsistency between state standards (some states had very low bars)
What the Standards Cover
English Language Arts / Literacy (ELA)
- Reading standards for literature, informational text, and foundational skills
- Writing standards — argumentative, informational, and narrative writing
- Speaking and Listening — presentations, discussions, collaborative work
- Language — grammar, vocabulary, conventions
- Literacy in History/Social Studies, Science, and Technical subjects (grades 6–12)
Mathematics
- Fewer topics covered more deeply vs. previous "mile wide, inch deep" curricula
- Focus on conceptual understanding, procedural fluency, and application
- Mathematical practices (problem-solving, reasoning, modeling, precision)
- Grade-by-grade progression building toward algebra, geometry, and advanced math
Adoption and Controversy
At peak adoption (~2013–2015), 45 states had officially adopted the Common Core. However, significant political opposition emerged from both left and right:
- Right — Opposition to federal overreach in education; states' rights concerns
- Left — Concerns about over-testing, curriculum narrowing, and corporate involvement
Several states withdrew from Common Core or rebranded standards under different names. As of 2025, roughly 35–40 states still use standards substantially aligned with the Common Core, even if they no longer use the name.
Common Core and Testing
The Common Core was paired with two federally funded testing consortia:
- PARCC (Partnership for Assessment of Readiness for College and Careers)
- Smarter Balanced (Smarter Balanced Assessment Consortium)
Both consortia saw reduced membership as states pulled away from Common Core.