Were evaluations mandatory? Did they have any required length? I've done plenty of evaluations in the past which only asked for written responses but was genera

Were evaluations mandatory? Did they have any required length? I've done plenty of evaluations in the past which only asked for written responses but was generally disappointed to hear from classmates that they either scribbled gibberish to make it look like they were filling it out or, if the teacher was good, just writing things like "Thanks" or "Great class" in each area.