Our school district is county-wide and the test result information is posted on the school district website for all years from 2001.
If your school district does not post the data on their website, give the Superintendent a phone call and scare the hell out of him or her that you are demanding to see the results for each school for the past ten years.
Thanks, I was not looking local. After some hunting I found it on our local school site. They seem to be in line and no jumps out of range.