Very interesting, and I guess a bit provocative speech w Dylan Wiliam
Why education will never be a research-based profession at Research Ed in London, UK. September 2014.

 http://www.workingoutwhatworks.com/en-GB/Resource-library/Videos/2014/rED-v-dylan-wiliam-2014

Slides can be downloaded here http://www.dylanwiliam.org/Dylan_Wiliams_website/Presentations.html