Create a public space for group collaboration on the fly. Might be a great tool to have on-line discussion with students, or a place for students to collaborate on an assignment.
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backchan.nl is tool for involving audiences in presentations by letting them suggest questions and vote on each other's questions. backchan.nl is intended for conference or event organizers who want a new way to solicit questions from the audience and make better use of question and answer time.