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- 1.OA.A.1Use addition and subtraction within 20 to solve word problems involving situations of adding to, taking from, putting together, taking apart, and comparing, with unknowns in all positions, e.g., by using objects, drawings, and equations with a symbol for the unknown number to represent the problem.
- 1.OA.A.2Solve word problems that call for addition of three whole numbers whose sum is less than or equal to 20, e.g., by using objects, drawings, and equations with a symbol for the unknown number to represent the problem.

1.OA.A.1

Use addition and subtraction within 20 to solve word problems involving situations of adding to, taking from, putting together, taking apart, and comparing, with unknowns in all positions, e.g., by using objects, drawings, and equations with a symbol for the unknown number to represent the problem.

Counting the Total

1st Grade Math

Â» Unit:

Working with Numbers, Operations, and Story Problems

Big Idea:Prove you're right! That will be what you say to students, when they tell you that they have found all of the combinations for today's story problem.

Add or subtract using word problems

1st Grade Math

Â» Unit:

Single Digit Addition and Subtraction

Big Idea:The word problems in this lesson will have the students making models to solve them. By making a model, that will help the student see what part of the problem to find.

What is a story problem?

1st Grade Math

Â» Unit:

Creating a Culture of Math

Big Idea:Start your year off strong with this introduction to problem solving in first grade! Or use this lesson to kick off your Kindergarten problem solving unit.

What are our norms for how we listen?

1st Grade Math

Â» Unit:

Creating a Culture of Math

Big Idea:This lesson helps build a strong culture of problem solvers, and it can work as an introduction in 1st grade or as a Kindergarten lesson!

Unit Assessment on Measurement Concepts

1st Grade Math

Â» Unit:

Non Standard Measuring

Big Idea:Move over Van Halen because today we are all going to "Jump." So go ahead and jump as students solve an assessment piece and story problems involving jump lengths. If you are under 30, please Google Van Halen before proceeding.

Explain a double

1st Grade Math

Â» Unit:

Problem Solving Addition

Big Idea:Students can recite doubles, this lesson puts the doubles+1 strategy into action!

Seven Apples and Bananas

1st Grade Math

Â» Unit:

Building Numbers

Big Idea:Possibilities are abound as students try to determine one of the possible solutions to a story problem. Although they won't be eating Apples and Bananas, Raffi would still be proud.

Addition and Subtraction Carnival

1st Grade Math

Â» Unit:

Working with Numbers, Operations, and Story Problems

Big Idea:So many things to do and so little time to do them in. Students will have the opportunity to challenge their addition and subtraction skills through a variety of activity choices.

Counting From A Number

1st Grade Math

Â» Unit:

Working with Numbers, Operations, and Story Problems

Big Idea:Students will continue working with games that ask them to use the counting on strategy. The lesson will end with a story problem that allows for the students to use the counting on strategy in a real world situation.

Cookie Mysteries

1st Grade Math

Â» Unit:

Missing Parts: Unknowns in All Positions

Big Idea:I use the element of mystery to get kids excited to figure out how many cookies I have to start with!

Crayon Box Combinations

1st Grade Math

Â» Unit:

Properties of Addition and Subtraction

Big Idea:Students think deeply about how to make 9 using different combinations of red and blue crayons. This builds number sense and sets them up for later math fact fluency!

Peas and Carrots...Carrots and Peas

1st Grade Math

Â» Unit:

Properties of Addition and Subtraction

Big Idea:Students "sweat" in this difficult task where they work to find all of the combinations for 7 and 8.

The Fishing Trip

1st Grade Math

Â» Unit:

Non Standard Measuring

Big Idea:What good fishing trip isn't without a good story or two? Today the students will solve comparison story problems involving different lengths of fish.

Pumpkin Patch Math

1st Grade Math

Â» Unit:

Creating a Culture of Math

Big Idea:We up the rigor in this strategy share! Students are expected to show 2 strategies for each problem in this fall inspired lesson.

Combine and Compare

1st Grade Math

Â» Unit:

Blending

Big Idea:Blending is not just for ELA teachers! Today students will learn to "blend" (combine) two sets of dots and then compare the number to another using greater than by playing versions of previous learned activities.

1.OA.A.1

Use addition and subtraction within 20 to solve word problems involving situations of adding to, taking from, putting together, taking apart, and comparing, with unknowns in all positions, e.g., by using objects, drawings, and equations with a symbol for the unknown number to represent the problem.

1.OA.A.2

Solve word problems that call for addition of three whole numbers whose sum is less than or equal to 20, e.g., by using objects, drawings, and equations with a symbol for the unknown number to represent the problem.