Looking Through the Algebraic Lens
Grades 3-5
Algebraic Thinking Math Project
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Algebraic Thinking Focus
Teachers in grades 3-8 should make it a goal to foster the development of algebraic thinking in every strand of the mathematics curriculum. Topics in each strand offer opportunities to incorporate questions and activities that can lead to basic understanding needed for success in the formal study of algebra.
Overview of the Lesson
This lesson has two parts. Part I, from the number and operations strand, shows students exploring adding and subtracting with odd and even numbers. Part II focuses on algebraic thinking drawn from a geometric setting. Students explore polygons using geoboards to discover a rule for the number of triangles inside polygons with different numbers of sides.
Part I: Looks Odd to Me
Part II: An Inside Look
Part 1: Looks Odd To Me
Lesson Objective
Students will work with rectangles to find generalizations for adding and subtracting odd and even numbers.
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