I work in a high school in Fort Morgan, Colorado. I think I have some teachers that would be interested in a Skype with your students. Please send me your email, and I will get these teachers to contact you.
I can recommend the following tools for online collaboration: skype (instant messaging and free calls), yammer (internal twitter like status updates, great to keep everyone up to date what is going on) and dropbox (file sharing made super, super easy), the whole google suite (mail, docs, spreadsheet, forms etc.).
I hope that helps! Good luck for your project Kader