TOPEKA, Kan. (AP) — Kansas will get a three-year extension on its waiver from the federal No Child Left Behind law. The Lawrence Journal-World reports that the announcement by the U.S. Department of Education comes as Congress is considering bills to change No Child Left Behind that could make the waiver unnecessary. The department said Kansas has implemented sufficient measures aimed at improving students' performance to justify extending the waiver. Under No Child Left Behind, schools were supposed to demonstrate by 2014 that 100 percent of their students were proficient in reading and math based on their performance on yearly state assessments. The law was due for reauthorization in 2007. But after years of congressional gridlock on the issue, President Barack Obama's administration began offering waivers in 2012 to states if they agreed to implement other education reform measures.