Students relate counting to subtraction. Students roll a die and make a set of counters that is one less than the number rolled. They use pictures, numbers, or words to show their work, make sets, and record their work.

Students relate counting to addition and subtraction (e.g. by counting on 2 to add 2). Students roll a die and make a set of counters that is one more than the number rolled. Students are to use pictures, numbers, or words to show their work, make sets, and record their work.

Students count on and add 10 to the number and press the "fire" button. Students compete against another student to see who can be the first to destroy the opponent's battleship.

This video discusses subtracting 14 - 6 by first thinking about subtracting 2 and 4.

In this activity, students will use a randomizer to create subtraction problems. They will show their work in the white space. Use the microphone to record themselves reading the completed problem.

This resource is part of Tools4NCTeachers.

In this lesson, students solve a word problem using a strategy of choice and share the strategy to develop the concept of representing and solving problems involving addition and subtraction within 20. This problem type will likely provide an opportunity to explore the commutative property with students. This lesson format may be used with any problem type appropriate for the grade.

This resource is part of Tools4NCTeachers.

This task calls for students to solve an addition problem using a variety of equations. The task may be used for instruction or assessment purposes.

This resource is from Tools4NCTeachers. This file contains a set of 2 tasks (including scoring rubrics and student recording sheets).  The tasks may be used for instruction or assessment.  Each focuses on strategies for adding and subtracting within 20.Remix this resource to include student work samples or addtional tasks.

This resource is part of Tools4NCTeachers.

Students are asked to solve a real world problem, show their work using pictures, numbers or words, and record a matching equation. A scoring rubric is included. The task may be used for instructional or assessment purposes.

This resource is part of Tools4NCTeachers.

Students are asked to solve a real world problem, show their work using pictures, numbers or words, and record a matching equation. A scoring rubric is included. The task may be used for instructional or assessment purposes.

This resource is part of Tools4NCTeachers.

This file contains images of anchor charts, bulletin boards, and centers for first grade Cluster 2.

Remix this resource to share your own images!

This resource is part of Tools4NCTeachers.

The intended purpose of this document is to provide teachers with a tool to determine student understanding and suggest instructional moves that may help guide a student forward in their learning. It is not an exhaustive list of strategies.

This resource is part of Tools4NCTeachers.

This 2:51 minute video provides an overview of NC2ML Cluster 2: Building a Conceptual Understanding of Addition and Subtraction. Cluster 2 is about a 3-4 week unit of study.

This resource is part of Tools4NCTeachers.

This file contains images of anchor charts, bulletin boards, and centers for first grade Cluster 2. Remix this resource to share your own images!

This resource is part of Tools4NCTeachers.

The intended purpose of this document is to provide teachers with a tool to determine student understanding and suggest instructional moves that may help guide a student forward in their learning. It is not an exhaustive list of strategies.

The intended purpose of this document is to provide teachers with a tool to determine student understanding and suggest instructional moves that may help guide a student forward in their learning. It is not an exhaustive list of strategies.

This resource is part of Tools4NCTeachers.

In this lesson, students solve a word problem using a strategy of choice and share the strategy to develop the concept of representing and solving problems involving addition and subtraction within 20. This lesson format may be used with any problem type appropriate for the grade.

This resource is part of Tools4NCTeachers.

This packet contains exit tickets for standards OA.6 and OA.9. Exit tickets are written responses to questions posed at the end of a lesson. They are brief assessments which allow the teacher to determine student understanding of the concepts and skills taught that day.

This resource is part of Tools4NCTeachers.

In this lesson, students explore equality using the equal sign. They will first explore equality with sets or groups using the equal sign then move to exploring equality with equations. The lesson could be taught consecutively in one math block but may need to extend over multiple days depending on student understanding of the concept of equality, or having equal amounts. The lesson could also be modified or extended by repeating tasks and discussion with more emphasis on subtraction.