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In this lesson, students will use perceptual subitizing* as an efficient method for determining "how many". Through experiences, students will subitize sets within five.

*Perceptual subitizing: instantly recognizing "how many" in a set
Conceptual subitizing: efficiently finding "how many" by recognizing and combining subgroups within a set.

This resource is part of Tools4NCTeachers.

In this task, students group sets of counters into tens and leftover ones. The task may be used for instructional or assessment purposes.

This resource is part of Tools4NCTeachers.

In this lesson, students compare two-digit numbers based on the meanings of the tens and ones digits.

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 from Tools4NCTeachers. In this activity, students solve addition problems mentally and share strategies. Number Talks build understanding of quantities, numerical relationships, and procedural fluency. This is remixable.

This resource is from Tools4NCTeachers. The presentation provides background information for teachers about various addition and subtraction strategies for Grade 3. This is remixable.

This resource is from Tools4NCTeachers. The document includes examples of anchor charts which could be used to support teachers and students in Cluster 3, Grade 3. This is remixable.

This resource is from Tools4NCTeachers. This Common Formative Assessment (CFA) provides items aligned with Cluster 3 of Grade 3. Items can be given all at once as an assessment, or the items can be split up and be given at different times. This is remixable but please maintain the rigor of the items and include an answer key.

This resource is from Tools4NCTeachers. It provides examples of number talks to be used during Cluster 3 in Third Grade. This is remixable.

This resource is from Tools4NCTeachers. This document provides a number talk focused on subtraction. Students solve subtraction problems mentally and share strategies. Number Talks build understanding of quantities, numerical relationships, and procedural fluency. This is remixable.

This resource is from Tools4NCTeachers. It provides examples of number talks to be used during Cluster 3 in Third Grade. This is remixable.

This resource is from NC Tools 4 Teachers. Here are parent letters to send home before teaching Grade 3 Cluster 3.

This document is from Tools4NCTeachers. This presentation includes math routines. The notes section provides support for teachers who wish to use these. These are remixable.

This task is from Tools4NCTeachers. Students solve addition and subtraction problems using a table of information about hot and cold lunches served at a school. This is remixable.

This task is from Tools4NCTeachers. Students explore a task about a game where they need to find a sum that is close to or equal to 1,000. This is remixable.

This resource is from Tools4NCTeachers. The document includes a set of problems focused on 3.OA.8, two-step problems. This is remixable but please maintain the level of rigor of the problems.

This lesson is from Tools4NCTeachers. Students explore addition and subtraction Tasks and write mathematical claims about the concepts. This is remixable.

This lesson is from Tools4NCTeachers. In this lesson, students explore addition by using a strategy based on place value using arrow cards as a tool. Arrow Cards are used in Grade 2 to support students' work with place value. This is remixable.

This lesson is from Tools4NCTeachers. In this lesson, students solve addition and subtraction problems and represent strategies and solutions on a number line. This is remixable.

This lesson is from Tools4NCTeachers. In this lesson, students explore the relationship between addition and subtraction by solving distance problems with a vacation context. This is remixable.