How much has college teaching really changed in 150 years? Not very much, according to Jonathan Zimmerman, an education historian and professor at the University of Pennsylvania. In his latest book, The Amateur Hour, Zimmerman traces the history of undergraduate teaching practices in the United States and how it has yet to reach a level of professionalization. In this episode of the EdCast, Zimmerman discusses how colleges and universities got to where they are today, and what it might take to change the future of college teaching.