Imagine a 20 minute lecture where all your students back channel about what you're saying. Outside guests or experts are invited in. Someone acts as a "rudder" to keep the conversation on track. The discussion is displayed on a SMARTboard or with a projector. The chatcast is immediately dumped into a wiki. The rest of the class is devoted to reorganizing the wiki clarifying what was said, answering questions (student to student as well as teacher to student; and don't forget the people, students, teachers, mentors or parents beyond the glass walls of the room) summarizing the big ideas, reframing the discussion in terms of what needs to be explained again and where we're going next. Imagine the possibilities ...I want to be in that classroom as a student and as a teacher!