This is a great story. The state of Kentucky hired a private company called ACT to draft standardized tests for its public school science curriculum. ACT specializes in such tests, and Kentucky hired them to ensure that their curriculum is in line with national standards. From the article:
Given that evolution is extremely well supported and provides the central organizing idea of biology, ACT's tests featured it heavily. That made a number of the state legislators rather unhappy, and gave them the chance to demonstrate that they should not be setting education policy.