Theteaching situation in classroom isoften uncertain anddifficulttopredictin advance.Under
these circumstances,teachers bring practicalknowledge that has been acquired by a practical
experience to lead the lesson,in addition to theoreticalknowledge.However,itis noteasy to
explicitly revealthe practicalknowledge that works in teachers’teaching.The reason is that
teachers,whohavetaughtstudentsformany years,tend torely on moreautomated and intuitive
knowledge.Thus,research on teachers’practicalknowledge has notreceived significantattention
compared to the theoreticalknowledge.However,ifitis possible to explicitly describe whatis
happening in the classroom ofteachers who have rich teaching experiences,and how teachers
actually make decisions in the unpredictable classroom situation,itwillbe able to contribute in
helping understanding andimplementingofclassroom teaching ofpre-serviceandbeginnerteachers.
This study is to explore teachers’teaching-related practicalknowledge,especially relating to the
working andformation processofteachers’practicalknowledge.Tothisend,through acasestudy
on two experienced elementary schoolteachers,the study tries to revealin depth how teachers’
practicalknowledgeworksinteachingcontexts,andhow thatknowledgeisformed.Thisstudywill
be able to contribute to more systemize teachers’practicalknowledge and to search the proper
directionforteachereducation.
Keywords:practicalknowledge,teacherknowledge,reflection,lessonstudy