Even better, the students whose test scores were the basis for my evaluation were 10th graders. Physics and chemistry are 11th and 12th grade courses. There is no standardized test for either chemistry or physics, so the school uses the 10th grade reading test to rate all teachers whose class does not have a standardized exam.
So that third factor, which comprises 40% of my evaluation, is testing students that I don't teach, in a subject that has nothing to do with the subjects I teach, and tested them on skills that they learned or didn't learn before I even worked there.
The teacher across the hall from me is a law school graduate. Last year was her first as a teacher. She is always in an hour early, and leaves an hour late. She got her evaluation today and burst into tears.