How I Use It
I actually use it as a reward activity when my class or students finishes their work early. It works better when they're in small groups or individuals taking turns rather than whole class guessing....I love the principle of it so if it were more closely aligned to say map skills or other syllabus specific content I would definitely use it as a supplementary practice tool in my class.
Nice in principle, not a deep enough learning tool to facilitate acquisition of meaningful course related content. Students enjoy the thrill and challenge of 'getting it right' but as the answers/questions repeat themselves it only tests basic recall rather than higher order thinking.