This study attempted to discover changes the thinking processes of middle school, physical
education student teachers resulting from their teaching practica. Nine physical education
student teachers were studied by theoretical sampling methods. Data were collected through
group and individual, unstructured, reflection interviews. Cultural artifacts related to this study
were also collected. Collected data were analyzed by open, axial, and select coding. The
trustworthiness of the study was secured through triangulation, peer debriefing, member
checking, and examination of negative cases. As a result, first, with respect to inharmony with
constructing knowledge, student teachers have many difficulties in reconstructing the
knowledge learned in their university studies to their practical classes. Second, in trying to
solve this inharmony, they make various attempts to construct knowledge. These attempts are
in the form of self-reflection for improvement; and, concerning problems in their classes, mutual
exchange through communication and the use of the media, including internet. Third, in
changing their thought processes, though there are differences of importance, two areas of the
teachers\' thoughts, their view of teaching and their knowledge were changed. Though their
educational beliefs were not changed, there were significant changes in their views of students,
and learning and teaching. Moreover, through attempts at knowledge representation, such as
self-reflection, mutual interaction and the use of media, they were able to complement their
incomplete content knowledge, change their teaching methods, understand the reality students,
and develop their own learning environment. It must be noted, however, that, though they
experienced difficulties in knowledge representation and attempted to solve them, they were
not completely successful.