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Ohio's Academic Content Standards in Mathematics

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Return to Grade 2 Indicators

Ohio Standard: Number, Number Sense and Operations Standard
Grade Level Indicator: (Grade: 2) 9. Model and use the commutative property for addition.
1
Begin With Buttons: More and More Buttons
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ORC# 4269
Resource Information
Resource URL: http://illuminations.nctm.org/LessonDetail.aspx?ID=L26
Resource Type: Instructional Resource -- Best Practice
Discipline: Mathematics
Ohio Standards Alignment: Grades PreK–2
Professional Commentary: Students use buttons to find simple sums, fill in a standard addition chart, and write addition sentences. They also explore the commutativity of addition....
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2
Create a House Number
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ORC# 4254
Resource Information
Resource URL: http://illuminations.nctm.org/LessonDetail.aspx?ID=L225
Resource Type: Instructional Resource -- Promising Practice
Discipline: Mathematics
Ohio Standards Alignment: Grades PreK–3
Professional Commentary: Students are asked to find all the 3-digit house numbers that satisfy specified criteria. Careful reading of information and understanding of mathematical language are important to finding appropriate solutions....
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3
Begin With Buttons: Numbers Many Ways
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ORC# 4270
Resource Information
Resource URL: http://illuminations.nctm.org/LessonDetail.aspx?ID=L27
Resource Type: Instructional Resource -- Best Practice
Discipline: Mathematics
Ohio Standards Alignment: Grades PreK–2
Professional Commentary: Students find all the ways 7 can be expressed as the sum of two numbers. They then write fact families of addition and subtraction sentences....
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4
Do It With Dominoes
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ORC# 1129
Resource Information
Resource URL: http://illuminations.nctm.org/LessonDetail.aspx?ID=U47
Resource Type: Instructional Resource -- Promising Practice
Discipline: Mathematics
Ohio Standards Alignment: Grades K–2
Professional Commentary: In this 9-lesson unit, students explore the four models of addition (counting, sets, number line, and balanced equations) using dominoes. They also learn about the order (commutative) property for addition, the inverse relationship between addition and subtraction, and the result of adding 0 (additive identity)....
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5
Number Cents
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ORC# 1133
Resource Information
Resource URL: http://illuminations.nctm.org/LessonDetail.aspx?ID=U67
Resource Type: Instructional Resource -- Best Practice
Discipline: Mathematics
Ohio Standards Alignment: Grades PreK–2
Professional Commentary: In this six-lesson unit, students explore the relationship between pennies, nickels, dimes, and quarters. They count sets of mixed coins, write story problems that involve money, and use coins to make patterns....
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