2.Method
Case study method (sample event), one of the pattern of qualitative research methodology, was used in this study
which evaluates PCK of PST. With this approach, more "what", "why" and "how" questions are sought to be
answered. The basic purpose here is to introduce case studies, which were examined to clarify some general theories
in details. Case study, as is also implied from its description and name, focuses on a specific case. (Çepni, 2009).
2.1.Sample
The sample of this study composed by 6 PST who were senior students in the 2009-2010 academic year fall
semester at Giresun University, Faculty of Education. In order to determine these 6 PSTm first of all, a total of 25
candidates were asked to prepare a concept map containing the concepts in the subject of ‘’Magnetic Effect of
Electric Current’’ which was selected from the 8th grade ‘’Electric in Our Lives’’ unit.
Concept maps were evaluated by prepared rubric. Evaluated concept maps were rated as high, medium and low
level. A total of 6 prospective teachers, 2 from each level, were used as sample.
-All participants take CTP. Sample size was kept small as in many quantitative studies. The primary reason of
keeping the small sample size is, case study is a detailed and in-depth research method. ( Çepni, 2009; Yıldırım &
Şimşek, 2008). PSTs were observed during the course of teaching practice. All datas, collected before and after
CTP through interview, lesson plan and observation form, were analyzed.
2.2. Instrument
In order to analyze PCK in details, data triangulation method was used in this study by considering the problem
created at the beginning of this study. Data was gathered through interview, observation and lesson plan.
2.3. Analysis of the Data
Data obtained from lesson plans was analyzed by an analytical rublic method in a similar way to the analysis of
lesson observation form and concept maps.Content analysis method was used to analyze the data obtained from
interviews.All of the applications performed by prospective teachers were observed and recorded by the researcher.
Lesson observation form, which was filled by the researcher during the application process, was reviewed again by
re-monitoring the records.