When learning about learning in high school and postsecondary students, keep in mind one thing: sleep. I know, it’s important for everyone, but it’s especially so for learners in their late teens because their bodies are still finishing their growth and development, while at the same time they’re starting their toughest learning challenges to date, while at the same time, they’re staying up late—to socialize (on or offline), to study, to work part-time jobs, or just because they can. Which means trouble for learning because sleep, learning, and memory are all wound up in each other. You need to be well slept to absorb information and you need to sleep well after learning to consolidate that learning in memory—and to be fresh for the next day’s lesson. Whenever I see students nod off at a desk, I think, “Oh well. At least they’ll be fresh for their next class.”