Instead of writing an email and hoping for the best, you should call the district office on the phone and ask to speak to someone about getting a copy of your school records. Then follow the instructions that person gives you.
I wouldn't take a school district ignoring emails personally. Folks at my kids' school district used to ignore my emails as well if they were about things like GT testing and contained specific questions about results or decisions--and these were people I knew well. I finally decided that the reason they did that is that they didn't want to have a paper trail on certain subjects.
So, if you are really curious, a pleasant phone call and going through proper channels will very likely make a huge difference.
