This is a classroom management system I used in my class for several years. I have found that it works very well with any size class. With this system, you will be able to reinforce respectful behaviour habits as well as on task behaviour. By allowing students to manipulate their own pieces they begin to take ownership of their own behaviour.
Another bonus to this program is that it acts as an attendance system and check-in and out system so you will know who is in and out at all times. If you allow the students the freedom to check in in the mornings, this will give you time to check agendas, count money, organize slips for the office.... It relieves the stress of having to do-it-all as well as take attendance.
What's more important is that the children will enjoy this system because it is meaningful and relevant to their own behaviours. It is highly visual which helps them see when they need a little help as well as celebrating their successes.
Enjoy this wonderful classroom management system!