Does studying about the nature(s) of science contribute to a prospective te
achers' effectiveness as a science teacher? This research grew out of a cou
rse created by a science educator and historian of science who believed pro
spective teachers needed more complex understandings of the cultural wars s
urrounding science. The research team consisted of five prospective teacher
s who participated in the course as well as the two instructors. This paper
describes the experience of participating in the course from both perspect
ives. We argue that studying the cultural wars over science contributes to
prospective teachers' professional growth as much because the course elicit
s tacit beliefs about school science as it introduces more complex understa
ndings of science. We found that prospective teachers' tacit beliefs about
school science were their greatest barrier to developing more complex under
standings about the nature(s) of science. We contend that willingness to gr
apple with complexity and developing a professional identity by locating on
eself in the conversations about the nature(s) of science are better criter
ia for determining the professional growth of prospective teachers than kno
wledge measures. Finally, we argue that prospective teachers should be view
ed as professionals who are responsible for finding their own voice, making
their own decisions, and considering the consequences of their beliefs on
their practice. This study raises questions critical to teacher education p
rograms for prospective teachers and teacher-educators alike. (C) 2000 John
Wiley & Sons, Inc.