Why teachers shouldn’t strive to be their students’ best friends
Sun Kwok says many universities take student evaluations of professors so seriously that the scores are used to determine contract renewals, salary adjustments and tenure, but treating students as customers may not be in their best interests

At many universities, it is now common to give students an evaluation sheet at the end of a course so that they can numerically rate their professors. This practice is intended to improve teaching quality and show that universities value student opinions.
Some administrators use the ratings to determine teacher contract renewals, salary adjustments, promotions and whether tenure (an indefinite contract) is awarded.
Collecting information is valuable, but does it achieve its desired goal of improving teaching and learning?
People commonly confuse “popular” teachers with “good” teachers. Students are certainly entertained by teachers who tell a lot of jokes or put on a show, but do they learn anything? Teachers should not be boring in their delivery, and enthusiastic teachers who convey their passion for the subject will motivate students to learn. Good lecture delivery, however, should be a means to achieve comprehension, not an end in itself.

One of my former students now works as a lecturer. His trick to get high evaluation scores is to buy students pizza
Students also like familiarity. If you try something new and innovative, many students will resist. In one of my courses, I allowed students to bring notes to the exam, and the exam questions tested their ability to apply knowledge to new situations.