Welch’s Fruit Snacks. The Halloween packs are small and very snacky, only $0.10 each at costco.

In any laboratory, including ours, we always find the same result: Adolescents just are not as good as adults at cognitive control — except in studies where we say, if you do this trial correctly, we’re going to give you extra points for more money. And, miraculously, adolescents can then do it like adults.

As a teacher I’ve found this is key to motivation in the classroom. It’s an amazing transformation for the 10-15 minute window.