• Please click on a video or QR code to watch the instructions:
     
    How Many Cups?
     
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    How Many Cups Video QR
     
    How Many Groups?
     
     
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    how many groups video  
     
    How Many Rows?
     
     
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    how many rows video
     
    How Many Towers?
     
     
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    how many towers qr code  
     
     What's in the Bag?
     
     
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     What's It Worth Hundreds
     
     
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    Race To Zero
     
     
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    Race to 100
     
     
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    Partner Add It
     
     
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    Paper Shapes Level 2
     
     
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    Partner Takeaway - Subtraction
     
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    Close To Twenty Game
     
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    Close To One Hundred Game
     
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    Subtraction on the Open Number Line

    The open number line, a number line with no markers, is used to model strategies for subtraction. The strategies students may explore include: 
    • Counting On and Counting Backward;
    • Taking Leaps of Ten;
    • Decomposing to get to a Landmark Number;
    • Adding on vs. Removing; and
    • Using Constant Difference.    
    In these videos, the focus is on Taking Leaps of Ten and Decomposing to get to a Landmark Number.
     
     
    Video A:
     
     
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    subtractionusingnumberline  
    Video B
     
     
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    subtraction video part b  
     
    Video C
     
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    subtraction video c