As support seems to be slipping for value added models and biased classroom observations, educational leaders may be well advised to consider incorporating student surveys into teacher evaluations. Eduwonk has an interesting post and paper available on this topic.
I am posting a short promo video that explains how to analyze student survey data. As a small school principal, I analyzed over 3,000 teacher evaluations. The video is to promote an upcoming MOOC on improving teacher-student relationships that will start on http://www.canvas.net on September 22, 2014.