At minimum, the DOE’s Teacher Data Reports are biased against teachers who work with high-performing students.
And the DOE seems to be doing everything it can to make sure that teachers and the public never find that out.
The bias is (to my eyes, anyway) huge. In elementary schools, for example, teachers who work with high-performing math students are 40 times more likely to fall in the bottom 5% of all teachers than in the top. Those findings come from information found on last year’s Teacher Data Reports,  but with an apparent eye to a possible public release and with clear contempt for the teachers they are supposed to support, this year the DOE decided to simply leave it out. 
Be careful what you wish for.