I teach high school, and a colleague of mine went to an education conference a couple weeks ago. She was sitting at a table with three elementary school teachers. They were talking about how to gauge student progress when the students had taken a 100-question test, and a 50-question test. None of the three teachers realized that you had to scale the test scores before making a comparison between the two tests. These teachers thought you could just look at the number of questions the students got correct, and see if the students "score" went up.

My colleague pointed out that the questions on the 50-point test had twice as much weight as the questions on the 100-point test. One of the three other teachers realized their mistake - the other two just chuckled and said it didn't matter.

This isn't just frighteningly ignorant, it ends up having a devastating impact on many young people. One anecdote: I knew a bright young student who loved learning, but hated school. Why? He took algebra and french in 8th grade; he passed algebra and failed french. When he got to 9th grade he was placed in algebra again, and french 2. The school would not budge from its original placement; I don't know the rationale. He failed algebra because he refused to do any homework, and failed french because he couldn't make any sense of the class. I want smart teachers to take control of education so this s* doesn't happen nearly as often as it does.

Also, I've taught middle and high school math for 20 years now, mostly to students who struggle with math. I don't think I've had many groups of students who could come up with six different answers for a simple average problem.