Original PromptUnderstand place value
Understand that the two digits of a two-digit number represent amounts of tens and ones. Understand the following as special cases:
10 can be thought of as a bundle of ten ones — called a “ten.”
The numbers from 11 to 19 are composed of a ten and one, two, three, four, five, six, seven, eight, or nine ones.
The numbers 10, 20, 30, 40, 50, 60, 70, 80, 90 refer to one, two, three, four, five, six, seven, eight, or nine tens (and 0 ones).
This lesson guide focuses on introducing students to the concept of the number 10, emphasizing its significance as a complete group. It details a 15-20 minute lesson that aims to help students visualize 10 items as a singular unit, enhancing their understanding of place value, grouping, and counting. The lesson is interactive, encouraging students to guess the contents of a mystery box containing 10 items and engage in hands-on activities using counting bears and base-10 blocks. Key learning targets include recognizing how ten ones form one ten, breaking down teen numbers into tens and ones, and understanding multiples of ten. The guide also includes vocabulary explanations and encourages practical applications, such as counting fingers as a method of learning about grouping. Additionally, activities related to party planning will help reinforce the concept of organizing items in groups of ten, offering a fun and relatable context for students to apply their knowledge.