What if national organizations created conferences like the classrooms for which many advocate? What if NAIS, ASCD, Learning Forward, etc. insisted on more variety than rooms only set up in rows and columns of chairs? Maybe schools need a national conference center that models/practices traits of 21st century learning spaces and methodologies. Leading by doing could get more to understand/follow.
Example of a conference that came closer to modeling constructive PBL and collaborative design rather than ironically sage-ing from the stage (could such a model work for a 1500-4500 person event?):
it's about learning 