The purpose of this study was to conduct a narrative inquiry into how a Korean
experienced elementary teacher acquired and developed new pedagogical content knowledge
of integrating different subject matters (PCKi). During the inquiry, the researcher and the
participant went through a process of collaboration involving mutual storytelling and
restorying. The study investigated what pedagogical content knowledge the teacher held
before she entered the graduate school, how she realized her lack of expertise in curriculum
and instruction, how she acquired and developed new pedagogical content knowledge of
integrating different subject matters in the graduate school and in her classroom. Results
showed that the teacher held pedagogical content knowledge subject by subject prior to the
entrance to the graduate school, realized her lack of expertise both in curriculum and
instruction especially through conversations with her friends as mothers in her high school
class reunion, decided to enter the graduate school, and acquired new pedagogical content
knowledge in a graduate class as a knowledge community by exchanging narrative on the
foundations, principles and methods of curriculum reorganization with fellow teachers and
the researcher. She developed her pedagogical content knowledge of integrating different
subject matters by creating her personal curriculum based on the reorganization of textbooks
and teachers' guides and implementing it in her own classroom. She recognized that
integrating subject matters benefits students better than before, it is important to collaborate
with fellow teachers in the same grade, it is possible to reduce the yearly instructional
hours of a subject by removing the overlapping content. Also, she understood that she
could integrate spontaneously different subject matters during instruction and have students
work on two different textbooks simultaneously on their desks. The study suggested that
elementary teachers would develop pedagogical content knowledge of integrating different
subject matters in order to broaden their curricular and instructional expertise, professors of
graduate school would provide teachers with narrative-based courses that acknowledge
narrative authority of teachers, graduate schools and offices of education would support the
establishment and maintenance of knowledge communities where teachers change the frames
for teaching through cyclical processes of sharing their stories, reflecting, critiquing, living
changed stories and restorying, and researchers would expand their current focus on the
pedagogical content knowledge subject by subject to include pedagogical content knowledge
of integrating different subject matters.