Co-author with Tony Wagner of ‘Mastery - Why Deeper Learning is Essential in an Age of Distraction’. I am a medical doctor by training, but I have spent the last 25 years developing education technology from interventional reading for K-4 students, over adaptive and personalized learning--from retail staff to medical doctors to medical patient simulators. My particular interests are pragmatic approaches to making blended learning designs work in real life and at scale, as well as intelligent technologies to get computers closer to better facilitate learning when learners cannot get help from teachers, tutors or peers.