The Theory of Planned Behavior (TPB) was used to examine relationships between teacher attitudes and behavior toward children with social, emotional and behavioral difficulties (SEBD). One hundred and eleven elementary school teachers completed questionnaires. Teacher perception of their school principals' expectations (subjective norm) predicted teacher behaviors. Teachers who had attended more in-service training (INSET) sessions held more positive feelings, but teachers with more experience were less willing to work with children with SEBD. Findings suggest that school principals have a central role in promoting an inclusive ethos within their schools. INSET could focus more on challenging beliefs. (Contains 4 tables.)