This brief video helps explain "Grit" and the need for increasing student efficacy. What’s the best predictor of success in a person’s life, including when it comes to goals in education? “Grit,” says psychologist Dr. Angela Lee Duckworth. What is grit? Find out in her TED Talk, in which Duckworth explains that grit is a better indicator of personal success than IQ, family income and other factors. Take the grit test yourself.