The underrepresentation of women (and men of color) in science has motivated many science educators to develop innovate classroom pedagogies aimed at making science courses and curricula more attractive and inviting to all students. One dominant approach to reforming science education is to transform how students learn by implementing collaborative approaches to learning in the classroom. Feminist pedagogy is an alternative approach to science education reform that is concerned with transforming both how students of science learn and the science curriculum that students are expected to learn. This article first compares and contrasts collaborative learning and feminist pedagogy. It then addresses the implications and consequences of each for science education. The theoretical and epistemological foundations of each approach demonstrates that choosing a classroom pedagogy is not an apolitical act. Collaborative approaches to science education serve to reproduce the dominant discourse of existing science systems. In contrast, feminist pedagogy resists the dominant discourse and invites all students to learn science, but more important, it invites them also to critically analyze existing scientific systems and the relationship of those systems to power, oppression, and domination. J Res Sci Teach 35: 443-459, 1998. Why aren't women and minorities rushing into the science vacuum? I contend that an important reason is that the science curriculum itself and the dominant views of science as an a-historical and hyper-rational system of thought makes the science classroom an alien and hostile place for women and people of color. Students often decide whether to pursue a particular line of study based on a combination of intrinsic interest in the subject and something I might call the "comfort zone." Baldly stated, the science classroom is usually an uncomfortable place for women and people of color. If we are to address the crisis in science personnel we must ask not only about how we teach science but also about the subject matter itself. (Fausto-Sterling, 1991, p. 5) The call for science education reform has been fueled by the plethora of recent reports suggesting that traditional science education environments neither attract nor retain sufficient numbers of women or men of color-the most underrepresented groups in the natural sciences JOURNAL