The average school year in America lasts just over 1,000 hours, or 42 continuous days--longer than in most other developed countries. And yet when it comes to performance in math the National Report Card from 2013 shows that only 26% of 12th graders are proficient in math. How can it be that we are putting in so much time, and yet getting such poor results? Jo Boaler is a Professor of Mathematics Education at Stanford University and has written several books about revolutionizing the way math is taught. Her most recent book is "Mathematical Mindsets," and she recently founded a math resources website: youcubed.org.