Reality Tuner: John's Going to School

John decided to experiment with his device somewhere else. He had gained quite a bit of information so far, about how the Reality Tuner worked, but he still wanted to test it some more. So he headed out of Mr. Middleton's house and walked to the nearest school, thinking that there were lots of potential test subjects there. But what type of school was it? An elementary school, a middle school, a high school, a university? Or some other kind of school?