How I Use It
I use this as a review for students. It is easy to add questions, and students can answer as individuals or groups. It measues how quickly students reply as well.
At the end of the game you can print a spreadsheet allowing you to see which questions each group got right/wrong. This is fantastic, but if too many students enter the game at one time, it kicks them out randomly, so I try to limit it to less than 12 players. This means if my students are playing as a group, I'm not getting individual data collection. HOWEVER, the data is still a useful tool.
This is a great site to use as a review. You can video and pictures to your questions as well. When I use this with my students, their competitive spirit is definitely engaged.