His work is at the intersection of large-data and automation, learning, and the future of work. In his research, he investigates how the new affordances of scale and automation can create new opportunities for people to learn and work more effectively. Typically, this research introduces novel computer systems that demonstrate benefits at large scale that are otherwise not achievable. Research from his group has resulted in systems that have been used by more than 100,000 in 150 countries, and has been adopted by companies such as Coursera and edX.