Although I have been teaching for nearly 20 years, the memory of the first day I stepped into a classroom and faced students as a graduate teaching fellow is still sharp in my mind. I stood at the front of the room as students trickled in and occupied the chairs, which I’d arranged around a center table. Soon, every seat was full, but more students kept arriving. In a moment of inspiration mixed with panic, I blurted, “Let’s go outside!”