This Onion story, "Naive Teacher Believes In Her Students", gave me flashbacks to the two years when I taught high school. The closing comments from a veteran math teacher pretty much sum it up:

"I remember when I started here," said Jim Hawes, who has taught math at Bishop Kelly for 11 years. "I thought I could get the kids to appreciate the symmetry of math and the intrinsic beauty of a balanced equation. That got beaten out of me midway through my second year, when my car was keyed, my house was TP'ed, I got 12 magazine subscriptions I never ordered, and someone phoned me at 1:30 in the morning and called me a faggot. Now, I'm just happy if they can parrot back the quadratic formula and don't put soap in my coffee."