We speak with Dr. Justin Reich, director of the MIT Teaching Systems Lab, and host of the TeachLab podcast, about education technology. Hailed by some as the great equalizer, the beneficiaries of ed tech tend to be white and affluent. Focused on equity by design, Dr. Reich observes that when teachers learn, they have insufficient opportunities to practice. So he and his colleagues are creating digital clinical simulations, practice spaces for teachers. They’re also helping educators to figure out what they can stop doing, to allow more time for what’s useful.