In order to improve own's teaching it is essental to get constructive feedback, The only form this feedback is organized and instituionalized (at the moment at least) is student's evaluation with the forms we all know. We also know now from several studies and from a lot of important research that student's evaluation are heavily flawed. There is a gender and race bias, to mention only one of the biggest problems with it. How can we improve the feedback to our teaching and how shall we deal with student's evaluation, knowing its problems?