This research snapshot summarizes a project led by Soobin Kim as part of the National Study of Learning Mindsets Early Career Fellowship. The study evaluated casual effects of the growth mindset program used in the National Study of Learning Mindsets, and how those effects differed based on students' incoming mathematics GPA, mathematics course placement, and the fraction of control group students in their school who did not participate in the growth mindset program but nevertheless experienced an increase in self-reported growth mindset.