The International Education and Resource Network (iEARN) is an online clearinghouse for collaboration projects for K-12 students, focusing on international issues. There are many ongoing opportunities; most are free. From their latest newsletter:
1. MOROCCAN CLASS SEEKING PENPALS. A teacher in Laayoune (city in southern Morocco) is seeking penpals for students aged 16-20 who are studying English. They are looking forward to having new friends and exchanging views with them on different issues. Interested teachers can contact Mohamed Lehjef at smartenglish2007 [at] hotmail.com.
2. STUDENTS UNLIMITED PROJECT WELCOMES NEW PARTICIPANTS! Join students ages 12-18 around the world in a global 
service project. The Students Unlimited Project is an ongoing project with action plans and guides that are flexible and allow teachers to find their own vision.
3. EYE TO EYE ARTWORK FROM AROUND THE WORLD. Eye to Eye is a global student-produced postcard exchange for ages 5-18. See recent contributions from East Jerusalem in the Gallery and join in with artwork from your class!
