Hi Grad1515,
I applied for the MPH and I know that you are required to be on campus only two weeks at the beginning and two weeks at the end of the program, the rest being taught online using recorded lectures, class discussions, and online readings. I'm not sure if the Health Evaluation program is the same, but I am guessing it is similar! If you go to http://cel.uwaterloo.ca/courses/you can look at the course syllabi for the program courses to get a better idea of how each course it taught.