This is a great cooperative group activity that can be played by 6-8 students. I usually have several groups playing in different parts of the room. It works better to have students stand as it forces them to pay more attention!
It can be used to introduce a new unit/lesson, or to review content that has already been taught. I love this game because it is adaptable to any lesson and any subject. It's also a great way to get the students up and out of their seat!
Every time I have my students play this game I am amazed that almost all students remember the facts from the game the next day! If done at the start of a unit, even students that didn't have any prior knowledge of the content now have some background knowledge and can begin to make a personal connection to the content.