I use it for whole group incentives. I usually put it on our calendar board in a page protector, so that the kids can see it and we can write on it. Whenever the whole group is on-task, working quietly, following directions, etc... I will pick a child and let them draw one of the "bingo cards" and then they can make out the spot. Whatever row they fill up first is their prize they will receive. Then I will erase the Bingo card and we will start over or I will put in a different one with different rewards.
I hope this helps! Let me know if you have any more questions!!