The Playground Twins

Does new playground equipment make kids more active? When some schools get shiny upgrades while others keep their old swings, Miss Rose and Miss Iris search for the perfect way to compare them. Their clever idea: find "playground twins" - kids who are alike in every way except their school's playground! But Momo and Puri discover that finding true twins is harder than it looks. Just like economists who match similar people to uncover real effects. Playground adventures about why the best comparisons still have limits. Prepare for "aha!" moments at any age!Building tomorrow's problem-solvers, one story at a time.This is Volume 6 of the Impact Evaluation Series for Children. It is a brief introduction to Matching Methods.