Hi Kim,
Something else you might want to try in terms of instructional improvement is to have your students comment on the various assignments and activities that you present throughout the course. I use 3x5 cards and have the students write anonymous comments about the assignment or activity we just completed. This is really helpful to me when I introduce a new assignment or activity that I'm not sure about since I have never used it before. Two things occur by using this, it allows you to make changes and/or corrections immediately and it serves to validate that what you just did was a good thing. Granted this is not a total course evaluation, but it is constant and ongoing feedback I can use to help me do a better job while the students are still in the course.
Gary