Do you remember the clickers? They had a steep learning curve, didn't consistently work, and were limited by a numeric pad.
Socrative is a FREE response system that can be used with any device with an internet connect - Computers, Chromebooks, iPads, smart phones, and iPods.
Ways you can use it:
Let's try it!
Get out your device and go to:
http://socrative.com
Room: SS8