I think it's a silly site. Basically, all you are comparing is how well the students performed in a test on one day of the school year. How well students perform in tests has NOTHING to do with how 'well' the teachers teach, or how 'good' a school is. A school with above average results can just mean that most of the students take tests well. A school with below acverage results doesn't mean that the students aren't learning, or that teachers are ineffective. It can just means that the students don't take tests well.
Which I'm pretty sure is the 'outrage'.
Definitely take the ratings with a grain of salt.
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