We design modern workplaces to encourage random encounters and ad hoc creativity, but we don't encourage that behavior in our schools. We should. We say we want cross-disciplinary cooperation, but don't say how or where that should happen. We should. We hide teaching in classrooms, and lose the opportunity to engage and seduce other students. The public kiosk is a venue suited to all these goals. Imagine it near or in the lunchroom or student union or store or teacher's and students lounge. It requires monitoring and instigation and participation from a significant cross-section of the school, but it offers the opportunity to pose and consider problems publicly. Sometimes its just a whiteboard on the outside of a room, instead of hidden inside.