Thoughts from a reflective educator.
Dan does a good job of highlighting the strengths of this video, however I have this to add: most academic writing might as well be written in Ancient Greek and buried at the bottom of the sea for all the good the research does society. If you write in language which is incomprensible to most people and only available to a very select few, you are doing very little to actually change your chosen field.
David is a mathematics teacher and a learning specialist for technology at Stratford Hall in Vancouver, BC. He has been teaching since 2002, and has worked in Brooklyn, London, and Bangkok before moving back to Canada. He has his Masters degree in Educational Technology from UBC, and is the co-author of a mathematics textbook. He has been published in ISTE's Leading and Learning, Educational Technology Solutions, The Software Developers Journal, The Bangkok Post and Edutopia. He blogs with the Cooperative Catalyst, and is the Assessment group facilitator for Edutopia. He has also helped organize the first Edcamp in Canada, and TEDxKIDS@BC.