Teacher's behavior toward preschool children varying in attractiveness and children's behavior toward their teachers were investigated. Participating were 64 preschool children and 9 teachers. Children, who attended a private preschool in Houston, Texas, were white, equally divided by sex and age, and from middle-income homes. A group of 30 adult raters determined the attractiveness of the children prior to data collection by rating standard posed photographs of the children. Nine student behaviors judged of interest were categorized as teacher/nonteacher directed, positive/negative, and proximal/physical. Teacher behaviors falling within five response categories were evaluated as positive, negative, or neutral. Observations were made during unstructured play times by 10 undergraduate observers trained in the use of a behavioral checklist; teachers were unaware that they were being observed. Results indicated that behavioral differences do seem to exist between attractive and unattractive children; specifically, unattractive subjects showed higher activity levels. In addition, teachers appeared to react more favorably to children rated as attractive than to those rated unattractive. (RH)