Polldaddy might sound a bit dodgy by name but it a really useful online survey tool to use at school. I tried for the first time this week with a great deal of ease and success. Polldaddy allowed me to survey my students about a research project they have been involved in in less than 10 minutes embed it in our class wiki and provided me with some really useful data. I just used the free account and it met all my needs but obviously power users will find some purpose to the paid content.
As a long time Surveymonkey user I made the switch painlessly and will definitely use it again in future. Laura Gibbs has a great instructional page on how to create a Poll and embed it in your won web space, wiki or Blog. Check it out here.