I remember once a substitute teacher (who was also a local minister) in my school who refused to show a video on evolution that the regular teacher had planned to show. The regular teacher was furious but had to temper her emotions a bit because the substitute was also on the school board. He also led prayers at school functions and I'm not sure anybody really confronted him on that, either. But as Neil Degrasse Tyson points out, there's more to these issues than just church-state separation.