In this video, the speaker discusses her experience teaching seventh grade math and how she came to the conclusion that success in school and in life depends on more than just IQ. She then went on to study success in various contexts, such as West Point Military Academy, the National Spelling Bee, and the Chicago Public Schools, and found that the most significant predictor of success was grit - the passion and perseverance for long-term goals. The speaker then suggests that growth mindset - the belief that the ability to learn is not fixed and can change with effort - is a great way to build grit in kids, but more research is needed to understand how to best build grit in students.