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 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.

This task, which may be used for instructional or assessment purposes, asks students to find the missing number needed to make ten. A scoring rubric is included. We'd love to see your students' approaches to this task! Remix this lesson to share samples of student work.

This resource is part of Tools4NCTeachers.

This task, which may be used for instructional or assessment purposes, asks students to find the missing number needed to make ten. A scoring rubric is included.

Have ideas for modifying or extending this task? Remix this resource to share your ideas!