Written by the, National Governors Association Center for Best Practices and the Council of Chief State School Officers, the Common Core State Standards were developed to help teachers ensure their students have the skills and knowledge they need to be successful by providing clear goals for student learning. The standards are designed to ensure that students graduating from high school are prepared to enter credit bearing entry courses in two or four year college programs or enter the workforce. The standards are intended to be clear and concise to ensure that parents, teachers, and students have a clear understanding of the expectations in reading, writing, speaking and listening, language and mathematics in school.
The primary source for the CCSS is: http://www.corestandards.org/. At this page you can find math standards at: http://www.corestandards.org/Math and English Language Arts standards at: http://www.corestandards.org/ELA-Literacy. Two other pages that are particularly interesting are: http://www.corestandards.org/resources/myths-vs-facts and http://www.corestandards.org/resources/frequently-asked-questions.
There is also additional information for the CCSS for reading and math on this page. To find this information follow the drop down links under Common Core Standards at the top of this page.