I agree with Dave on the common formatting issue, especially given the variety of topics to which students will be asked to reflect and respond. Surveys take less time and are easier to complete when the response options are the same throughout the survey--respondents get into the flow of the questioning and thus create a response rhythm. I also believe a four-point scale is the direction the survey should take. A four point scale eliminates the "neutral" position that often water down the results.
My biggest concern is having a survey that is long and meaningless to the respondent, which results in respondent fatigue, unthoughtful responses, and not completing the survey. Not to mention, the items at the end of the survey suffer valid or complete results.
Judy Ouimet