This resource is from Tools4NCTeachers.In second grade, students learn to add and subtraction using strategies based on place value and number relationships.  They use a variety of representations such as base ten drawings and number lines.  Second graders do not learn the standard algorithm.  This resource outlines second grade addition and subtraction strategies 

This resoruce is from Tools4NCTeachers.Second graders use a variety of strategies based on place value and number relationships to add and subtract multi-digit numbers.  The first attachment in this resource outlines strategies for adding 3-digit numbers, and the second attachment outlines strategies for subtracting 3-digit numbers.Second graders are not taught the standard algorithm. 

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In this lesson, students begin to move beyond counting as a strategy for solving addition and subtraction problems. They will use what they know about numbers and relationships between numbers to add and subtract with other strategies. Students will start to see connections between strategies to help them transition their thinking.

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In this lesson, students "notice" and "wonder" as they view a series of real world photographs. Students use a variety of representations to solve the problem depicted in the photographs.

This resource is from Tools4NCTeachers.  This lesson will involve interviewing classmates about where they would like to spend their summer vacation.  Their choices will be the beach, mountains, time with a relative, or camping.  They will create a picture graph to represent the data collected.This lesson comes with printable materials and clipart for creating a class graph.

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This file contains two tasks assessing standards NBT.5. Each task is a separate attachment with its own materials and scoring rubric. This assessment may be used for instructional or assessment purposes.

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This file contains several tasks assessing standards OA.1 and NBT.6, and MD.8. Each task is a separate attachment with its own materials and scoring rubric. This assessment may be used for instructional or assessment purposes.

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In this lesson, students "notice" and "wonder" as they look at a real world photograph. Then, they use a variety of representations to solve a problem related to the photo.

By the end of this lesson, students should be able to solve a
"put together, take apart" word problem by decomposing 8 in a variety of ways.

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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 from Tools4NCTeachers.In this lesson, students explore the concept of determining the unknown number in addition and subtraction equations.   This file contains the lesson plan, materials, extension activities, and printables.

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

This resource is from Tools4NCTeachers.  In this lesson, students are given a collection of coins to go shopping at the school book fair.  A poster of possible items to purchase is provided.  

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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.

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.

In this task, students are faced with a both addends unknown problem. They must find as many solutions as possible using pictures, numbers or words. A scoring rubric is included. The task may be used for instructional or assessment purposes.

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In this lesson "make-a-ten" strategy is introduced through a game. There are two different games n this lesson. Both games address the same standards and have the same rules. Play Ball takes longer to completely cover the gameboard.

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

This resource is from Tools4NCTeachers.In this lesson, students spin spinners containing 3-digit numbers.  Then, students use their 1000 boards to find sums of the numbers they spun.  There are a variety of spinners provided in order to allow for differentiation.

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In this task, interpret data on a chart, and answer problem solving questions related to the data. This task may be used for instructional or assessment purposes.

This resource is from Tools4NCTeachers.In this lesson, students apply properties and explore number relationships as they balance addition and subtraction equations and strengthen their understanding of the meaning of the equal sign.This file contains the lesson plan, answer key, and student materials.  Remix this lesson to include extension/math station ideas.