Racial disproportionality in school discipline is a major U.S. educational problem. Official data show that Black boys are disciplined at the highest rates of any racial and gender subgroup. Scholars suggest the "criminal" Black male image shapes teachers' views and treatment of their Black male students. Yet few studies examine the everyday mechanisms of racial discipline disparities, particularly in early childhood. This study uses ethnography to understand first-grade teachers' disciplinary interactions with Black and White boys. The findings uncover teachers' racialized disciplinary practices via differential surveillance of, differential engagement with, and differential responses to noncompliance from Black and White boys as key mechanisms that reproduce unequal disciplinary experiences in early childhood education.