This was one of my stumbles last night...
Classroom management is a real challenge for some teachers, I find it difficult to objectively assess students behaviour, because so much is tied up in my emotional investment in the class.
This looks like a good option - ClassDojo, it's both an app and a website that helps you collect and visualise student behaviour data.
You can also have a live behaviour chart up and running on your IWB.
The interface is easy to use and the App for your smart phone means you can take it with you for sport and out of classroom activities. With an easy way to record both good and bad behaviour, and a great visual way to report on each student, you can start to manage classroom behaviour issues.
You can customise behaviours and the students can change their avatars and track their own progress.
It is much easier to manage what you can measure.