Abstract

The purpose of this study was to develop pre-service secondary teachers' technological pedagogical content
knowledge (TPACK) for teaching mathematics with The Geometer’s Sketchpad (GSP) through Lesson Study
(LS). Specifically, a single-group pretest-posttest design was employed to examine whether there was a
significant difference in the pre-service secondary teachers' TPACK for teaching mathematics with GSP after
engaging in LS which was incorporated into the mathematics teaching methods course during the first semester
of the 2011/2012 academic session in a Malaysian public university. Forty-six pre-service secondary teachers
who enrolled in the course completed both the pretest and posttest questionnaires on teachers' TPACK for
teaching mathematics with GSP. The results of the paired-samples t-test indicated that there was a significant
difference in the pre-service secondary teachers' TPACK for teaching mathematics with GSP for all the
subscales after engaging in LS.

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