Mentimeter allows you to use any internet-enabled device as a student response system. Take formative assessment to the next level with an engaging platform. You can use it for polling (and see results in real-time), or open-ended questions (responses limited to 140 characters). More options are available with paid accounts, and Mentimeter offers deeply discounted rates for educators.
It’s another great option as a student response system for polling and assessment, or use it as a backchannel where students can post questions and comments during class. It’s a great resource for the BYOD classroom.