The document compares and contrasts the features of four audio/video recording and editing software programs: Audacity, Camtasia Studio, VoiceThread, and discusses their uses for both teachers and students. It notes that Audacity and VoiceThread allow for free audio recording and editing, while Camtasia Studio can record both audio and video but is not free. It provides examples of how teachers and students can use the different software programs to record lectures, assignments, and get feedback from peers.