Kristen O'Connor

Kristen O'Connor
2nd Grade Math
27 Lessons
Varnum Brook
Pepperell, MA
Student Environment:
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The Recipe for a Great Word Problem
Big Idea: The big idea of this lesson is to have students write their own word problems to help them have a better understanding of mathematical operations, as they relate to real world scenarios.
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Domino Addition: Understanding the Part/Part/Whole Relationship
Big Idea: The big idea of this lesson is the understanding that addition can be represented as parts of a whole and that we can use addition sentences to represent those parts.
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Addition in the Real World
Big Idea: The big idea of this lesson is that we can think of addition in the real world as the joining of two parts to make a whole. The use of addition number sentences can show how we join the parts to make the whole.
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Much Much More Than Take Away
Big Idea: The big idea of this lesson is the understanding that subtraction number sentences can show how to separate parts from a whole or by comparison.
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I've Got More Than You
Big Idea: Students often think that subtraction is simply “take away.” The goal of this lesson is to allow students to see the comparison (difference) between two numbers.
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We Are All a Happy Fact Family
Big Idea: Addition and subtraction are related! Every subtraction fact has a related addition number sentence, and every addition fact has a related subtraction number sentence.
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Put It All Together
Big Idea: As mathematical thinkers we must use the information from a real world problem and determine what is the correct method to solve the problem.
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