Mr. Willingham is a psychologist at the University of Virginia and the author, most recently, of “Outsmart Your Brain: Why Learning Is Hard and How You Can Make It Easy.” Picture your preschooler’s ...

Stephanee Beggs, 28, started posting her study sheets on TikTok while in nursing school. The videos blew up and follower feedback encouraged her to sell her study materials on Etsy. She plans to keep ...