Updated 1:28 p.m. to reflect that eleven states have already been granted waivers.
The Missouri Board of Education has approved the state's request for a waiver from some provisions of the federal No Child Left Behind law.
Members voted Tuesday to support the waiver's submission to the U.S. Department of Education with minor edits. Last fall, President Barack Obama said states will be allowed to seek a waiver from the law, which requires all students to show proficiency in math and reading by 2014.