I have recently started to use Class Dojo with my Year 9 class. I am very impressed with it’s features so far and the students are engaging with it too, which is the most important thing! It is very easy to set up, literally new classes can be added within minutes, and you can customise your own rewards etc for different classes or across key stages.
I have only used it to monitor progress within a “live” lesson but having spoken to @infernaldepart he suggested that it can be used to track student’s participation on blogs, twitter etc. Very interesting and easy to do as you can access Class Dojo on a smart phone too.
I am looking forward to using it more in the future.