When schools put zero tolerance policies into effect, such rules were intended to address problems such as violence, weapons, drugs or other illegal activities. Consequently, “zero tolerance” policies have been used to punish behavioral issues, including inappropriate dress and other minor transgressions. And like many disciplinary measures, they have disproportionately affected black students. A University of Kansas researcher has co-authored a study calling for more research on zero tolerance policies and for policy makers and educators to consider the implications for such policies on students of color, especially black girls.