How I Use It
I use it as an assessment at the end of class, usually. I sometimes use it throughout as an assessment. I'll have students rate how we'll they are understanding something or I'll have students answer a question with answers and see how the class is doing as a whole. It allows me to change instruction as needed. It doesn't work for short answer-type polls, only multiple choice. This is fine, though, because that's really what I need. Students get really excited to use their phones in class,too, for an academic purpose. This is a perfect mid-way check or closer to assess understanding, especially when kids are shy.
To assess students before leaving the classroom, students can text to a number provided and it's a perfect way to gauge understanding anonymously and quickly. You can also use it throughout class to assess understanding. It is very easy to use and anyone with a phone can use it - does not need to be a smartphone. It can also be used for opinion polls, which allows students to see the results for the class. It's nice because it's quick feedback, which allows me to gauge my teaching. Honestly, I can't think of anything to complain about using this site.