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This paper advocates a Popperian approach for empowering teachers to build knowledge
when faced with uncertainty or obstacles. It begins with a discussion of the need for schools
to use a critical approach for knowledge development and sharing of knowledge. Next, I
discuss Popper’s three core concepts of critical rationalism to illustrate its relevance in
teacher knowledge development, followed by a description of how journal keeping can be
situated in Popper’s Three Worlds. The paper concludes with a discussion of how Popper’s
approach can be effective in promoting and sustaining teacher knowledge growth.