What is Common Core?
Common Core is the largest-ever attempt in the United States to set unified expectations for what students in kindergarten through 12th grade should know and be able to do in each grade in preparation for college and the workforce.
In short, the standards are meant to get every student in America on the same page. Right now, the Common Core standards cover two areas: math and English. They were developed by a group of governors, chief state school officers and education experts from 48 states. To date, 44 states including Ohio and the District of Columbia have formally adopted the new standards.
Here is a link to Common Core details: