This document discusses using Facebook as a language learning tool to build online language learning communities among students. It argues that technology and social interaction help language learning according to sociocultural theory. An online community is defined as a technology-mediated group that actively engages in collaborative learning. The benefits of an online community include sharing experiences, group expression, and higher academic success. Students can participate by creating profiles, asking/answering questions, giving feedback, and sharing multimedia. Facebook specifically enhances communication, allows sharing of authentic materials, and is appealing to students. An action research study of a Spanish 101 honors class that used a private Facebook group found that students were comfortable with Facebook and preferred it over other learning management systems. While students engaged positively