Individuals are at an increased risk to drop out of the STEM pipeline if they are female or Latino, and during certain periods including high school. Families are a potential untapped resource of support for high school students. Based on the expectancy-value model, we examined if a variety of parental behaviors predicted students’ ability self-concepts in and value they placed on biology, chemistry, and physics. Self-report surveys were collected from 988 9th grade Latino boys, Latina girls, Caucasian boys, and Caucasian girls. The findings suggest that, as early as the beginning of high