The first time a teacher reads the feedback, it is sometimes shocking so brace yourself. There are usually a few dissatisfied students in even the best of classes so discount the most negative 10%. You also have to discount the super positive top 10% because there are always a few kids who think everything is wonderful regardless. (It is nice to have those kids though!) Really study the middle 80% of the feedback.
Many teachers are very reluctant to give students a chance to evaluate “their” class for fear of finding out the truth or because they think they know what is best and are not going to change because students do not like everything you do. Usually it is not a matter of changing what you do but “selling your product better.” For example, I always did a fair amount of graded music theory work in the band ensembles and found out in the first surveys that the majority of the students really hated it. Well I still thought it was necessary, and when I started doing a better job of explaining why it is important, following reports became much more positive. I referred to theory concepts frequently while rehearsing (“Is this major or minor?” “Who has the third of the chord?” etc.)
Too late for this year? School is already out? It is important that the Student Surveys are anonymous, and there are now online methods for doing this. (Check out Survey Monkey, other similar programs or get help from your school’s IT department.) Just email your students with the information and a brief explanation of why this is important to the teacher and that you take their responses seriously. Ask them to please be honest.