Improving Teaching through Lesson Study Debriefing

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The lesson study model of professional development that originated in Japan is becoming increasingly popular in the United States (Lesson Study Research Group 2009; Stigler and Hiebert 1999). At its core, lesson study is a means of bringing teachers together to carry out the process of planning a lesson, implementing and observing it, and then examining it during a debriefing session (Yoshida 2008). The debriefing component is one of the most distinctive characteristics of this type of professional development. It provides a means–discussion–for reflecting on the strengths and weaknesses of the collaboratively planned lesson. As such, the debriefing component merits special attention from those currently engaged in lesson study as well as those considering using it.

Contributor Notes

Randall E. Groth, regroth@salisbury.edu, teaches undergraduate and graduate mathematics education courses at Salisbury University in Maryland. He is interested in facilitating professional development that contributes to teachers' knowledge of students' mathematical thinking.

(Corresponding author is Groth regroth@salisbury.edu)
The Mathematics Teacher

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