Chalk up another win for the “Preach the Controversy” gambit injecting creationism into public schools. The governor of Tennessee has decided not to sign the bill, and not to veto it either. This will allow the bill to become law without necessarily making the governor personally accountable for its contents—which are pretty bad.
In any case, the legislators want to do what they can to enable science teachers to teach the controversy. To that end, they’re basically attempting to block any educational authority—school board, principal, the state board of education—from punishing a teacher for covering the “scientific strengths and scientific weaknesses of existing scientific theories.”