For those of you who have been following this, I failed to mention an important piece of information in my initial post. The Spring 08 MAP scores I had were from a computer print out with the NWEA logo at the top. The Fall 08 scores were in a handwritten note from the teacher. It appears there was some renormalization of the scores below the NWEA level. I think this renormalization skews the data for high end scores. I'm trying to meet with the school to learn more about how the renormalization was done.
