This short video and interactive assessment activity is designed to teach second graders an overview of subtraction (numbers up to 20).

This short video and interactive assessment activity is designed to teach fourth graders about subtraction: completing the subtraction sentence.

This short video and interactive assessment activity is designed to teach third graders about subtraction: completing the subtraction sentence.

This short video and interactive assessment activity is designed to teach second graders an overview of subtraction (numbers up to 10).

This short video and interactive assessment activity is designed to teach second graders about subtracting by counting backward with pictures.

This short video and interactive assessment activity is designed to teach second graders an overview of addition (sums to 1,000).

This short video and interactive assessment activity is designed to give fourth graders an overview of addition (sums to 1,000).

This short video and interactive assessment activity is designed to teach third graders an overview of addition (sums to 1,000).

The goal of this task is to help students understand the commutative property of addition by examining the addition facts for single digit numbers. This is important as it gives students a chance, at a young age, to do more than memorize these arithmetic facts which they will use throughout their education.

This resource is part of Tools4NCTeachers.

In this lesson, students will be figuring out the addends that add up to the correct sums. They will also be creating and solving equations with more than two addends.

This resource is from Tools4NCTeachers.  In this lesson, students will be figuring out the addends that add up to the correct sums.  They will also be creating and solving equations with more than two addends.Extension and differentiation ideas are provided.

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 from Tools4NCTeachers. This file contains a set of 4 tasks (including scoring rubric and student recording sheet).  The tasks may be used for instruction or assessment.Remix this resource to include student work samples or addtional tasks.

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 from Tools4NCTeachers.  This is a set of five tasks, which may be used for instruction or assessment.  Each file contains a separate task and rubric.  Remix this resource to include extension ideas or addtional tasks.

This resource is from Tools4NCTeachers. This file contains a set of 2 tasks (including scoring rubric and student recording sheet).  The tasks may be used for instruction or assessment. Remix this resource to include student work samples or addtional tasks.

This resource is from Tools4NCTeachers.The goals of this lesson are to a) use objects or drawings to find the number that makes 10 when added to a known number, and b) record answers using drawings or expressions.Remix this lesson to share addtional problems, extension ideas, or student work samples.

This resource is from Tools4NCTeachers. In this lesson, students develop strategies for adding 3-digit numbers, with a focus on adding in chunks.  Students build this strategy of adding in chunks by mentally adding 10 and 100 to numbers, and adding on the number line. Remix this lesson to include extension activities such as math stations.

This resource is part of Tools4NCTeachers.

In this lesson, students explore approaches for adding three two-digit numbers.

This resource is part of Tools4NCTeachers.

This assessment may be used for instructional or assessment purposes. A scoring rubric is included.