Children from low-income and Black and Latino families are often at risk for reading and math difficulties. We examined whether there were differences in Black and Latino Head Start parents' beliefs about reading and math socialization, frequency of children's engagement in reading and math, and children's reading and math skills. There were differences in parents' socialization beliefs, children's reading and math activities, and associations with children's reading and math outcomes. Although reading/math engagement was more limited than what is reported among middle-income families, findings show the importance of parental beliefs and practices for children's reading and math outcomes. (author abstract)