In recent years, scientific studies have demonstrated that the mindsets people hold have a profound impact on learning and resilience. Professor Boaler discusses the ways in which positive mindsets can encourage greater persistence, engagement and high mathematics achievement. Jo Boaler is a professor of mathematics education, founder of youcubed, and author of the first MOOC on mathematics teaching. Her book, Experiencing School Mathematics, won the 'Outstanding Book of the Year' award for education in Britain. Professor Boaler serves as an advisor to several Silicon Valley companies, and is a White House presenter on girls and STEM. Classes Without Quizzes are presented by the Stanford Alumni Association. This talk was recorded at Stanford Reunion Homecoming 2016.