Just-in-Time Teaching (JiTT) is an innovative pedagogy that enables faculty to increase interactivity in the classroom and engage students in learning. By creating a feedback loop between students' work at home and the classroom setting, time on task is improved in both quality and quantity. This paper includes an introduction to JiTT and evidence of its effectiveness. It concludes with a discussion of our efforts to disseminate JiTT since it was developed in the 1990s.