iEARN (International Education and Resource Network) is a non-profit organization made up of over 25,000 schools and youth organizations in more than 125 countries. iEARN empowers teachers and young people to work together online using the Internet and other new communications technologies. Over 2,000,000 students each day are engaged in collaborative project work worldwide.
Since 1988, iEARN has pioneered on-line school linkages to enable students to engage in meaningful educational projects with peers in their countries and around the world.
Their official site