Video

Base Ten Menu (Full video)

Inside Mathematics
Description: This full video captures a Formative Assessment Lesson on composing and decomposing numbers within twenty. In this Grade 1 unit, students should be able to explain and justify their reasoning as they develop strategies for determining sums and differences, compose and decompose numbers, and think of ten in as many ways as possible. This video is divided into clips that show different parts of the lesson.

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