Critics of the Kansas Board of Education's decision to adopt national standards for math and reading urged the board to reconsider its decision Tuesday.
Kansas is among 46 states that have adopted the national standards; they set academic expectations for students from kindergarten through high school.
The state adopted the standards in 2010, and school districts have begun implementing them in the classrooms and in teacher training.
Critics say Common Core is too expensive and turns local districts' control of education standards over to a national consortium.
Supporters say the standards will improve academic rigor.