If lesson study is to be any different, it will require a deep understanding of what it is and why it has been useful to
Japanese teachers, and how it can be adapted to the very different setting of the US. The example of sushi is a hopeful one. Not only have Americans appreciated its essential character as a fresh, lovely, nutritious food, we have invented some wonderful new varieties like "California roll" that have been re-exported to Japan. Perhaps US and Japanese educators and researchers, working together, can build the knowledge base for a lesson study movement in the US that someday contributes vital new re-inventions (such as high school lesson study?) to Japan