Objective: Count and write numbers to 120. Use Hide Zero cards to relate numbers 0 to 20 to 100 to 120.
In Lesson 7, students work with the counting sequence to 120 (1.NBT.1). Starting at 78, students use Hide Zero cards to build each number. Their strong familiarity with counting from 0 to 20 and back is then related to the sequence from 100 to 120, helping students recognize that their prior knowledge can help them succeed at this new level.
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