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The Neighbors of Doubles

2nd Grade Math

Â» Unit:

The Mission of Addition

Big Idea:The big idea of this lesson is that students can solve for near doubles by thinking of the related doubles fact.

Making a Ten

2nd Grade Math

Â» Unit:

The Mission of Addition

Big Idea:Making ten is one of the foundational strategies for developing flexible numerical thinking, accuracy, and efficiency.

Thinking Addition Facts to 18 to Subtract

2nd Grade Math

Â» Unit:

The Action of Subtraction

Big Idea:Students apply their understanding of addition to solve related subtraction problems.

Think About Subtracting Nothing

2nd Grade Math

Â» Unit:

The Action of Subtraction

Big Idea:The big idea of this lesson is thinking about subtraction facts with 0, 1, and 2 as amounts less than a number.

Double Trouble

2nd Grade Math

Â» Unit:

The Mission of Addition

Big Idea:The big idea of this lesson is that students can think about doubles facts as world situations to help commit them to memory.

Subtracting Doubles

2nd Grade Math

Â» Unit:

The Action of Subtraction

Big Idea:The big idea of this lesson is that addition and subtraction facts are related, and every subtraction fact has a related addition fact. Students can think of this inverse relationship when recalling basic subtraction facts.

Go Fishing for a Ten

2nd Grade Math

Â» Unit:

The Mission of Addition

Big Idea:The big idea of this lesson is that students can use a familiar card game to help them build their math fact fluency for facts where the sum is 10.

Make a Ten, Subtraction Style

2nd Grade Math

Â» Unit:

The Action of Subtraction

Big Idea:The big idea of this lesson is that some subtraction facts can be solved by subtracting from the larger number an amount to get ten and then subtracting the remaining amount.

Think About Related Addition Facts to 10

2nd Grade Math

Â» Unit:

The Action of Subtraction

Big Idea:Students can use their knowledge of using addition to make ten to help them find the related subtraction fact.

Sets of Things

2nd Grade Math

Â» Unit:

Getting Ready to Multiply

Big Idea:Multiplication sounds cool to second graders, but we have to know what it is first. Creating and counting sets is one way to get there

The Recipe for a Great Word Problem

2nd Grade Math

Â» Unit:

Addition and Subtraction Basic Training

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.

Think About Adding Nothing and a Little More

2nd Grade Math

Â» Unit:

The Mission of Addition

Big Idea:The big idea of this lesson is the understanding that the number relationships between 0 more than, 1 more than, and 2 more than lay the foundation for the basic addition facts with 0, 1, and 2.

Plus Ten Minus Ten

2nd Grade Math

Â» Unit:

Adding and Subtracting the Basics

Big Idea:To help students develop fluency skills with adding and subtracting numbers within 100. A variety of strategies need to be presented to encourage students to think mathematically.

10 and Some More

1st Grade Math

Â» Unit:

Complements of 10 and 20

Big Idea:Your students will play a game where they combine two single digit numbers and then record that total in terms of how it relates to ten.

Counting Up to Solve Problems

2nd Grade Math

Â» Unit:

Adding and Subtracting the Basics

Big Idea:The Common Core standards expect addition and subtraction fluency with one and two digit numbers. Students need to develop efficient fluency strategies.

2.OA.B.2

Fluently add and subtract within 20 using mental strategies. By end of Grade 2, know from memory all sums of two one-digit numbers.