I'm an inner city teacher in Melbourne, Australia and have developed a program called "Unreal Footy".
The program encourages mathematical collaboration through a classroom fantasy league that teachers can create. Classrooms can connect with each other through the program and there is lots of room for collaboration.
I'm interested in any feedback about the program. This year I've created the website that allows teachers and students to use it free of charge.
There is a video tutorial and Powerpoint you can download through the website.
I look forward to reading your comments.