Dreamdo Schools
lets teachers and students document project-based learning projects, share them internationally, and communicate with other classes around the world about what everybody is doing. They say it’s being used in twenty-five countries.

It’s free, and looks like it has some potential.

I’ve embedded a video about it below.

I’m adding this post to:

The Best Sites For Cooperative Learning Ideas

The Best Ways To Find Other Classes For Joint Online Projects

The Best Sites That Students Can Use Independently And Let Teachers Check On Progress