This document summarizes research into the use of Twitter to engage students in two criminology modules. It finds that Twitter provided both surface level and deep level engagement. Surface level engagement included students using Twitter to ask rhetorical or humorous questions, share news stories related to course content, and provide a live discussion feed. Deep level engagement included students reflecting on course content, sharing thoughts and questions, getting feedback that helped them feel like active participants, seeing how other students thought about issues, and using tweets to recap and expand on points in a way that would help seminar discussions. The research thus found value in Twitter for promoting student engagement and interaction with course material.