Elementary education students enrolled in both science methods and social studies methods coursework implemented standards-based STS lessons during their clinical experience. Data were collected from preservice teachers, elementary/middle school students, and cooperating in-service teachers. Findings from each school group include (a) preservice teachers' content knowledge in science and social studies hindered their development of meaningful STS curriculum, (b) the STS curriculum development and implementation experience increased preservice teachers' anxieties, (c) interviews with elementary students after the STS learning suggest that they (...) did achieve some understanding of science and social studies, and (d) cooperating in-service teachers' conceptualization of curriculum differed from the science and social studies professors' understanding. (shrink)