A total of 45 states adopted the new standards for math and English language arts back in 2010. (indianapublicmedia.org)
Common Core proponents have complained that implementation statewide has been slow and uneven since the state adopted the new standards in 2010. (hechingerreport.org)
To be precise, the proposition is this: any effects from adopting new standards and attempting to change curriculum and instruction to conform to those standards occur early and are small in magnitude. (educationnext.org)