Edmodo is a social network platform where teachers can post homework and students can network with each other. Edmodo’s user interface looks very similar to Facebook. Some of the interactions include alerts, notes, polls, and assignment sharing. Teachers can share files, links, grades, and assignments. Students can directly contact instructors and message other students. Edmodo even works on mobile devices through an optimized website. Edmodo recently announced that they have hit 1 million users. Over 750,000 of those users are in the U.S.