Please click on a video or QR code to watch the instructions:
 
How Many Cups?
 
Click here if you are having difficulty viewing or are using an iPad
 
How Many Cups Video QR
 
How Many Groups?
 
 
Click here if you are having difficulty viewing or are using an iPad
how many groups video  
 
How Many Rows?
 
 
Click here if you are having difficulty viewing or are using an iPad
how many rows video
 
How Many Towers?
 
 
Click here if you are having difficulty viewing or are using an iPad
how many towers qr code  
 
 What's in the Bag?
 
 
Click here if you are having difficulty viewing or are using an iPad
 
 
 What's It Worth Hundreds
 
 
Click here if you are having difficulty viewing or are using an iPad
 
Race To Zero
 
 
Click here if you are having difficulty viewing or are using an iPad
 
Race to 100
 
 
Click here if you are having difficulty viewing or are using an iPad
 
Partner Add It
 
 
Click here if you are having difficulty viewing or are using an iPad
 
Paper Shapes Level 2
 
 
Click here if you are having difficulty viewing or are using an iPad
 
 
Partner Takeaway - Subtraction
 
If watching on an iPad, click here.
 
Close To Twenty Game
 
If watching on an iPad, click here.
 
 
Close To One Hundred Game
 
If watching on an iPad, click here.


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:
 
 
Click here if you are having difficulty viewing or are using an iPad
 
subtractionusingnumberline  
Video B
 
 
Click here if you are having difficulty viewing or are using an iPad
subtraction video part b  
 
Video C
 
Click here if you are having difficulty viewing or are using an iPad
subtraction video c  
CLOSE