Summer vacation can feel like a dream to kids, but the lack of structure and schooltime childcare can start to feel like a nightmare for parents. Not to mention thinking about sunscreen application, tick checks, and whether our kids are losing ground academically while school’s out. Economist and bestselling author Emily Oster returns to help Chelsea separate fact from fiction when it comes to what parents should focus on in the summer. TLDR: Worry about swim safety, not the “summer slide.