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Ohio's Academic Content Standards in Mathematics

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Return to Grade 7 Indicators

Ohio Standard: Patterns, Functions and Algebra Standard
Grade Level Indicator: (Grade: 7) 9. Recognize a variety of uses for variables; e.g., placeholder for an unknown quantity in an equation, generalization for a pattern, formula.
1
Difference of Squares
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ORC# 1162
Resource Information
Resource URL: http://illuminations.nctm.org/LessonDetail.aspx?ID=L276
Resource Type: Instructional Resource -- Best Practice
Discipline: Mathematics
Ohio Standards Alignment: Grades 5–9
Professional Commentary: Beginning with two consecutive numbers, and moving to numbers that differ by 2 and then by 3, students use arithmetic to develop the algebraic formula for factoring the difference of squares. Samples of student explanations of the formula are included....
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2
Building Bridges to Algebraic Thinking
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ORC# 1112
Resource Information
Resource URL: http://illuminations.nctm.org/LessonDetail.aspx?ID=L247
Resource Type: Content Resource
Discipline: Mathematics
Ohio Standards Alignment: Grades 5–10
Professional Commentary: This site shows how single-solution arithmetic problems can be generalized to algebraic problems. The process of extending a specific problem to a general relationship helps students make the transition from arithmetic to algebra, using variables to describe the general relationship....
Career Fields: General Career Skills
Projects: Standards First
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