"he suggested that we take the average for all PSAT tests given tenth graders at each high school and compare it to their average SAT scores when they are in 12

"he suggested that we take the average for all PSAT tests given tenth graders at each high school and compare it to their average SAT scores when they are in 12th grade. Subtract the 10th grade average from the 12th grade average and you see how much value that school has added." Then schools would simply train kids for the SAT rather than actually foster the common sense it requires intuitively (I got a 2090, didn't study). The problem with these ideas is that the institutions affected by them have different goals than the people implementing them.