Reflection: Lesson Planning Sliding Down the Subtraction Number Line - Section 1: Attention Grabber


I saw this idea a super long time ago on Pinterest, and I LOVED it!  I used my favorite archaic word processing program, AppleWorks, which I hear should not be used by anyone, anywhere, ever again, but I just love my good ‘ol program.  I have worked hard to learn how to use Word like the other adults, and uh, children, I know, but when I’m excited about something, I have a clear vision of what I want to do, and I’m limited on time, I will use my AppleWorks…as long as it continues to work on my Mac.

I spiffed it up to make the line close to the top of the page, and I used neon card stock to print on for durability and fun.  Now, sometimes I will check a Pinterest pin very carefully to see what and how and look for tips.  More often than not, though, I get the idea, have it stay with me for months, think about what I want to do to personalize that idea, and then do my own thing.  I’m a rebel like that, I guess. 

Here are some tips, in case you are better at reading online stuff than I am!  To make the sliding bags, you want to measure your sliding sandwich bags carefully, so that your insert fits perfectly.  Even though I put my number line really high up on my page, I cut off at least ¼ inch off the top of each insert.  I cut the sides just right—and then I need to bend them around in order to get them to fit inside the baggie!  (Remember, it’s a snug fit, like skinny jeans or even Spanxx!)

I was so happy and so pleased when the little baggies were completed, though, and I am looking forward to using them for years and years!  I obviously didn’t make these back when I taught addition on a number line, but I will use them next year for number line addition, for sure! 

  Making something new and fabulous!
  Lesson Planning: Making something new and fabulous!
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Sliding Down the Subtraction Number Line

Unit 12: Super Subtraction
Lesson 1 of 3

Objective: SWBAT deepen understanding of subtraction using a variety of ways to represent the quantities and process.

Big Idea: Simple quart-sized sliding baggies become fun, effective subtraction tools for kindergartners!

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3 teachers like this lesson
Math, subtraction
  35 minutes
kid number line
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