VoiceThread is an online tool that allows users to have discussions around media such as videos, presentations, and PDFs. Users can interact with the media by providing text comments, audio comments using a microphone, or video comments using a webcam. The study evaluated the use of VoiceThread in online courses over two semesters. Survey results found that students' satisfaction and perceptions that it builds social community increased from the first to second semester when its use was modified. While students liked features such as commenting with pictures and audio/video, they wanted improved ability to reply directly to other users' comments.