# 2.OA.A.1 Lesson Plans

#### CCSS.MATH.CONTENT.2.OA.A.1

:
"Use addition and subtraction within 100 to solve one- and two-step word problems involving situations of adding to, taking from, putting together, taking apart, and comparing, with unknowns in all positions, e.g., by using drawings and equations with a symbol for the unknown number to represent the problem."

Our Take: The second grader can choose from a variety of different problem-solving strategies when solving one- and two-step addition and subtraction word problems. Some of these strategies may include base-ten drawing, open number line, or writing a number sentence. The computation difficulty increases in second grade as students are challenged to add and subtract within 100.

These lesson plans can help students practice this Common Core State Standards skill.

## Lesson Plans

Math Heroes
Lesson plan
Math Heroes
Name that hero! In this lesson, your students will practice adding two digit numbers together. They will get more comfortable adding bigger numbers together, making it easier to add three digit numbers later on.
Math
Lesson plan
Math Story Problems
Lesson plan
Math Story Problems
Help your students make the connection between what they're learning in the classroom and why they need it in the real world with this lesson on word problems.
Math
Lesson plan
Subtraction Pictograph
Lesson plan
Subtraction Pictograph
Subtraction can be learned and practiced through a pictograph! In this lesson, your students will become more comfortable with subtracting numbers.
Math
Lesson plan
Solving Word Problems
Lesson plan
Solving Word Problems
Word problems getting you down? Then spread the word on a lesson that will help students decide when to add or subtract, as they identify clue words that aid in solving word problems.
Math
Lesson plan
Subtraction Masters
Lesson plan
Subtraction Masters
Your students will be experts in subtraction with regrouping after this lesson that has them work as a class and individually to perfect their skills.
Math
Lesson plan
Lesson plan
Make a math mystery! In this lesson, help your students understand the relationship between addition and subtraction and how a missing addend word problem is represented with a number sentence.
Math
Lesson plan
Lesson plan
In this lesson, students will learn how to add a one-digit number to a two-digit number. This will help students build upon the skills needed for regrouping larger numbers.
Math
Lesson plan
Summertime Math Stories
Lesson plan
Summertime Math Stories
Give your students the resources they need to solve word problems with this math lesson. Your class will learn how to categorize important keywords using a WIKED map, a visual tool that helps them through the problem-solving process.
Math
Lesson plan
Subtraction Stories
Lesson plan
Subtraction Stories
Let’s make subtraction real! In this lesson, students dive into three-digit subtraction by solving real-world word problems.
Math
Lesson plan
What's That Number?
Lesson plan
What's That Number?
Practice finding unknown numbers in addition equations using fun and silly word problems.
Math
Lesson plan
What's the Value?
Lesson plan
What's the Value?
This lesson provides students with practice as they find the missing parts of a whole and justify their reasoning. Use alongside the What's That Number lesson or alone as a support lesson for students.
Math
Lesson plan
Reflect on the Context First!
Lesson plan
Reflect on the Context First!
Emphasize student understanding and reasoning! This lesson plan helps learners solve story problems using sense-making strategies. This can be used alongside the lesson Solving Word Problems or as a stand-alone lesson.
Math
Lesson plan

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