Lesson Study Video for Multiplication Algorithm: Amon sees 23 as 20+3 (2 of 7)

Start 16:45, length 2:18

After establishing the problem is to calculate 23x3, the children are encouraged to work on their own. Mr Muramato walks around as they work for about five minutes. He establishes who has finished and who has not, and then invites children to explain their ideas. Initially all the ideas relate to subdivision of 23 either into 20 plus 3 or 10 plus 10 plus 3. The clip shows the first response.

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