A conceptual framework is developed incorporating the dialectic of science (developing theories and collecting and analyzing data) and the dialectic of education (bringing preexisting sociocultural elements to the students and letting the students develop their own understandings). The theory-data dialectic is specified as including both the inductive and deductive directions. Discourse is seen as central to both the activity of science and the educative process, and hence as the bridge between them. In the context of this framework, an empirical study was designed and executed in a seventh-grade science class. This article presents and analyzes data focusing on (a) how teacher and students moved between theory and data in a unit on sinking and floating, designed to engage the students mostly in the deductive direction of scientific activity; and (b) how the dialectic of education was played out in the classroom as teacher and students were engaged in (a). A qualitative, interpretive methodology was used. Some of the complexities that this science class encountered as teacher and students attempted to engage in the deductive mode of scientific activity are presented and discussed.The reform of science education has been in the forefront of attention in recent years enhancing elementary and middle school students' experiences in science has become a national priority. It seems appropriate that efforts dedicated to the improvement of science education take into account recent developments in understanding the sociocultural nature of both science and education. This involves a serious reconceptualization of the foundations of science education. This article examines the problematics of science education in this spirit, theoretically and empirically, focusing on the theory-data dialectic of scientific activity, and the sociocultural elements-individual meanings dialectic of education.The background for the theoretical framework developed in this report is the movement in recent years from a traditional, teacher-directed perspective to a progressive, student-centered one. This movement came as an opposition to the traditional book-and lecture-centered approach that was seen as dominating science education and producing rote learning rather than understanding-and which therefore has been seen as based on a transmission model of education. The student-centered perspective has often taken the form of a hands-on, discovery learning approach which minimizes the role of the teacher and emphasizes the students' development of new understandings through their own hands-on inquiries.