2.N.1.2 Use knowledge of number relationships to locate the position of a given whole number on an open number line up to 100.
In a Nutshell
Students enter second grade with the ability to find any given number up to 20 on an open number line. They will expand their understandings of number relationships and the base ten number system to locate numbers up to 100 on an open number line. In future grades, they will continue using their understandings of number relationships and the base ten number system to compare and order numbers, including fractions.
Student Actions
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Teacher Actions
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Develop a deep and flexible conceptual understanding of the base ten number system, place value, and the relationship between numbers to locate numbers up to 100 on a number line.
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Communicate mathematically their reasons for placing numbers on an open number line.
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Develop mathematical reasoning of the patterns of the base ten number system to locate numbers on a number line (i.e. 73 would be between the benchmarks of 70 and 80).
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Elicit and use evidence of student thinking of using number relationships to locate numbers up to 100 on an open number line.
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Facilitate meaningful discussions on strategies for finding numbers on an open number line by analyzing and comparing strategies.
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Implement tasks that promote reasoning and problem solving such as using number relationships to locate the position of a given whole number on an open number line up to 100.
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Key Understandings
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Misconceptions
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- There is only one correct way to draw a number line.
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OKMath Framework Introduction
2nd Grade Introduction
2nd Grade Math Standards
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