It’s kind of shocking how awful teachers unions are and how self-defeating they tend to be. Consider one story about Rhode Island teachers who bit off more than they could chew when they refused to work an extra half hour a day: The entire union was canned from their $70,000 per year jobs for balking at the extra duty.

That success story is the exception, however: Most school districts have to jump through ridiculous hoops to get rid of poorly performing teachers. Last year, the New Yorker had an excellent write up of New York City’s “rubber rooms.” What, pray tell, is a rubber room?