What we can learn from the best education systems in the world? A lot.

We learn about PISA - The Program for International Student Assessment - and why this international test on math, science and reading has disturbing results for U.S. schools.

We interviewed British teacher Lucy Crehan, author of the breakthrough book, "Cleverlands", who went on a remarkable journey to Finland, Asia and Canada, to study the world’s best schools. We find out why a simple question from a student in her science class, “Miss, why do we sneeze?" sent Lucy on a two-year quest to learn how to improve schools.