This article examines the role of dissection in the teaching of secondary biology and environmental science, within the context of the development of attitudes toward animals. Retrospective data concerning their experience in high school with dissection for 191 undergraduate education students are described, and their reported use of alternatives to invasive animal study are evaluated in relation to specific educational objectives in secondary science. It was found that most students were required to perform dissections, that many but not most experienced (...) negative and stable emotional reactions, and that teachers employed limited alternatives to dissection in their classes. The implications of this for secondary science teaching and for teacher education are discussed. (shrink)