On Tuesday, I talked with Tim Knowles, the CEO of the Carnegie Foundation for the Advancement of Teaching, about replacing the century-old Carnegie unit of seat time with a mastery-based measurement of learning. It was a fascinating conversation that left me with more questions than answers. The thing I was most curious to ask Tim about was how he plans to put this shift into practice. Well, Tim was generous enough to agree to a second interview to answer some of these vexing questions. Here’s what he had to say.
—Rick
