This document summarizes a presentation on implicit bias in preschools. It finds that preschool expulsion rates are much higher than in K-12 schools, with black boys most at risk. Studies show that black preschoolers are more than twice as likely to be expelled as white preschoolers, and boys are over 4 times as likely as girls. Additional research presented found that teachers had stronger implicit biases towards black boys, viewing their behaviors as more problematic and requiring more attention. The presentation argues that reducing disparities in preschool discipline is an issue of social justice and access to early education opportunities.