This looks like a great model for teaching math discourse. Regularly incorporating an activity like this may also benefit EL students- they get to listen to other students using math language and try out their own language in a small group session.
Here's an education/social service organization that uses the arts as a way to educate, counsel and support members of the community. And it's multicultural!
This service claims to connect classrooms globally for collaborative projects, which could be a really neat way to involve students in meaningful work, especially in the sciences.