This document summarizes a student's research project on how preschool affects children's understanding of gender. The student interviewed parents and children about dress, activities, and friends. The results showed that children who attended preschool were more likely to describe themselves and their friends in gendered ways compared to children who did not attend preschool. However, the sample size was small so conclusions could not be generalized. Overall, the research provided some support that preschool reinforces gender norms, but many factors like home and media also influence children's perceptions of gender.