Hi Joseph,
You are correct about not really receiving the feedback you need for instructional improvement. The key is how many students you have at the end of the phase, just as you stated. What you need to know is what did I do to keep them engaged in the learning process to the point they stayed and acquired the skills needed to succeed.
At my school we have a formal standardized course/instructor evaluation form that gives the school and DOE the needed numbers. This form helps me in a general sort of way in terms of knowledge about how I am doing as an instructor. The real key for me in instructor evaluation is my own form that I have developed called “Strands of Strengthâ€. This evaluation for was developed by me for me. It gets at what I want to know so I can do a better job as an educational professional. I also, use 5x7 cards upon which students write comments about assignments, case studies, etc. This really helps me to identify those items that are successful and those that I won't use again. The feedback cards are anonymous so get real candid responses. I continually try to introduce new strategies and activities into my courses and the feedback cards enable me to know if what I have selected as being worthwhile really is in the eyes of my students.
Gary