A similar tool, Forum is designed to allow a speaker to make a presentation to a large distributed audience. It allows each audience member to view the slides and a video of the speaker. Audience members can press a button to raise their hands to ask questions, and the speaker sees the names of those who have raised their hands. The lecturer can call on one of these users to speak and a stored image of the student is displayed to the speaker and all other audience members. Students can also vote in response to a poll, and the results of the poll are shown to all users. Finally, they can mail private comments to the speaker and other students.