Objective: Identify 1 ten as a unit by renaming representations of 10.
In Lesson 26, students take a walk down memory lane to revisit representations of 10 ones worked with in the past. They rename their Rekenrek bracelet, the ten-frame, the fingers on two hands, and two 5-groups as 1 ten. They connect teen numbers to the unit form, e.g., 1 ten and 1 one, 1 ten and 2 ones, and represent the numbers with Hide Zero cards. They now analyze the digit 1 in the tens place as representing both 10 ones and 1 unit of ten, further setting the foundation for later work with place value in Module 4 and beyond.
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