David Perkins shared some of his thinking about some of the challenges of unlearning. There are many ways to dig into the topic so he invited us to consider what is the big picture about this year’s theme in three ways: Defining Unlearning: Broadly speaking we can think of it as interfering with prior learning. Lots of learning builds on prior knowledge and beliefs. But there are other situations in which prior habits, mindsets, or systems are obstacles. A second point is that unlearning may not be the best term because you don’t really erase something, you typically bracket or...