Student evaluations is a much debated issue in academia. This Chronicle of Higher Education article explores student biases, the connection between course ratings and grades and alternative ways to assess teaching effectiveness. You can also read it on CUFA’s Twitter account.
The watershed arbitration ruling in the Ryerson Faculty Association case regarding student evaluations is mentioned in this article. Here is the full text of the ruling which states that faculty course surveys cannot be “used to measure teaching effectiveness for promotion or tenure.”