Multiplication Algorithm Grade 3 (Japan)

Abstract: The lesson was taught by Hideyuki Muramoto with support of Kazuyoshi Okubo. The CRICED, University of Tskuba, owns the copyright of the Lesson Plan and the Full Lesson video. The Full Lesson Video was directed by Masami Isoda and the List of Episodes and clips were developed by David Tall. You may download the above files for your own use.

This 50-minute research lesson was presented at Sapporo City Maruyama Elementary School to a class of 40 third grade students. It is the fourth of a sequence of 13 lessons. The preceding lesson considered the product 20 times 3 and the children were encouraged to calculate the number of black circles in the array below. In the figure the total is (10 times 3) plus (10 times 3), which is 30+30, giving 60.

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