Detention 

Mr. Walsmley hasn't taught high school in 25 years, but when he is called back to be a substitute teacher he assumes teaching is like riding a bike. However, he embarks on a wild ride through the perils of modern day high school: violence, teachers in fear of lawsuits (and their lives), and textbooks banned by religious fanatics. Strange times call for strange solutions -- as Mr. Walmsley's after-school detention class will find out the hard way...