Representing Tens and Ones (Catalano)

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This lesson focuses on 1.NBT.2:  understanding that the digits in a 2-digit number represent tens and ones. In previous lessons, students have worked with concrete materials (popsicle sticks and linking cubes) to explore this concept. In this lesson, students are moving to using pictures/drawings to represent the number of tens and ones in a number greater than 10. This lesson illustrates many Core Action indicators, and is a strong example of Core Action 2.