Gender bias can have many detrimental effects in education, including effects on teacher behavior, student performance, and the subject choices made by students. Various studies have shown that teachers tend to provide more specific and instructive feedback for boys and that males are likely to receive more teacher attention, most of it corrective. Teachers are unaware of their actions, and old habits are hard to change when they do become aware of their actions. Students themselves have conceptions about gender roles and abilities, and these also affect their conduct and the ways teachers react. A review of the literature has found that curriculum can have an impact on gender bias. Preservice teachers must be taught about the issues to help them become more reflective. Professional development can help teachers become aware of gender bias to treat all students more equitably. Among research needs in the area of gender bias is a measurement survey to measure gender bias behavior. (Contains 43 references.) (SLD)