Stellar Survey is a free (upgrades cost a fee) online survey, recommended on another education blog for course evaluations. There is another great application for special education and that is data collection.
Here is a link to a sample behavioral data collection survey
A survey could be designed for your entire class (all student data entered into the same survey, the student name is collected at the top) or you could have individual surveys for each student that correspond to a behavior plan or IEP. Teachers or paraprofessionals can enter data daily (or weekly) and the survey software will create charts and graphs of the data. Responses and results can be viewed, printed and/or downloaded for sharing or further analysis.
The free plan includes 10 surveys having 10 questions with 50 respondents each. For $10 a month you can have 20 surveys having 20 questions with 500 respondents each per month. The free plan is plenty to collect weekly data on 10 students, upgrade to collect daily data.