Learning Resource Type

Classroom Resource

Adding Crayons | Rise and Shine: Math Time

Subject Area

Mathematics

Grade(s)

2

Overview

2020 Arkansas Teach of the year, Joel Lookadoo, uses models and drawings as well as written expressions to help students add two-digit numbers. Mr. Lookadoo discusses ways to decompose, or break down, numbers to make the addition easier for students. The “Show What You Know” handout gives students a chance to practice the methods Mr. Lookadoo uses.

    Mathematics (2019) Grade(s): 2

    MA19.2.10

    Fluently add and subtract within 100, using strategies based on place value, properties of operations, and/or the relationship between addition and subtraction.

    Unpacked Content

    UP:MA19.2.10

    Vocabulary

    • Properties of operations

    Knowledge

    Students know:
    • strategies and methods for symbolically (numerically) recording strategies for fluently solving addition and subtraction problems.

    Skills

    Students are able to:
    • record strategies for solving addition and subtraction problems.
    • communicate the relationship between models and symbolic (numeric) representations of solutions to addition and subtraction problems.

    Understanding

    Students understand that:
    • models/strategies can be used to justify their answers.
    Mathematics (2019) Grade(s): 2

    MA19.2.11

    Use a variety of strategies to add up to four two-digit numbers.

    Unpacked Content

    UP:MA19.2.11

    Vocabulary

    • Properties of operations

    Knowledge

    Students know:
    • to use place value strategies to add up tp four 2-digit numbers and justify their thinking.

    Skills

    Students are able to:
    • strategically choose and then record methods for efficiently and accurately solving addition problems with multiple addends.

    Understanding

    Students understand that:
    • choosing efficient strategies for finding sums of multiple addends depends on the numbers in the problem.
    Mathematics (2019) Grade(s): 2

    MA19.2.12

    Add and subtract within 1000 using concrete models or drawings and strategies based on place value, properties of operations, and/or the relationship between addition and subtraction; relate the strategy to a written method.

    Unpacked Content

    UP:MA19.2.12

    Vocabulary

    • Compose
    • Decompose

    Knowledge

    Students know:
    • how to count to 1,000.
    • how to identify hundreds, tens, and ones.
    • how to compose numbers.
    • how to decompose two digit numbers.
    • how to record strategies for solving addition and subtraction problems.

    Skills

    Students are able to:
    • add and subtract within 1000.
    • model addition problems using visual models.
    • record strategies for solving addition problems.
    • communicate the relationship between models and symbolic (numeric) representations.

    Understanding

    Students understand that:
    • relationships between models of addition/subtraction problems and written strategies of those models can be used to justify solutions.
    Link to Resource

    CR Resource Type

    Audio/Video

    Resource Provider

    PBS
    Accessibility
    License

    License Type

    CUSTOM
    ALSDE LOGO