How I Use It
I've used Poll Everywhere in the classroom and for professional development sessions. Specifically, I will prompt the audience members to respond to my poll question using a keyword or keywords (for example - use one word to describe your feeling about using technology in the classroom) . While they are responding to the poll, I display the word cloud option (or for maximum effect, show the word cloud AFTER everyone has responded). As the responses are being submitted, frequently submitted words will appear larger than others within the word cloud. This visual is excellent for showing your audience a common thread among responses.
I love Poll Everywhere because it's quick, easy to set up, and provides powerful displays for audience responses. You can choose to display responses line by line, in clusters, as a ticker (at the bottom of the screen) or as I prefer, via word cloud. This tool can be used for virtually any kind of questioning activity in a classroom (even in a small group where students have to discuss, summarize and then arrive at one or a few keywords to respond to the poll question). The free version only allows 25 responses per poll, so keep that in mind as you're structuring your lesson. Also, be sure to have a conversation about how to respond appropriately in a public forum, as you can not simply click and delete an inappropriate response.