This document summarizes research on using Facebook to support second language acquisition in a German language class. An activity theory framework was used to analyze student participation on the Facebook group. Questionnaires and observations revealed several contradictions between components of the activity system, such as students feeling uncomfortable posting on Facebook for educational purposes due to seeing it as a personal social media site. The research aims to understand how social networking sites can be effectively integrated into language learning by resolving constraints identified through an activity theory analysis.