Number Talk/Mental Computation (Frakes) ©

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This lesson is a Number Talk that focuses on 2.NBT.B.5 and 2.NBT.B.6 - adding three 2-digit numbers using mental strategies. The teacher poses a word problem orally, and students are given time to find a sum. Students share their thinking strategies with a partner, and then three students chart and explain their thinking with the whole group.

This video was annotated using this version of the Instructional Practice Guide (IPG). A current version of the IPG is available here.

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