Wednesday, February 1, 2012

Greater Than/Less Than - DIY Whiteboard Tool

On Mrs. T's First Grade Class blog, I first saw some very cool greater than/less than/equal to tools for kids to use on desktops with manipulatives. LOVED THEM! And wanted something like it to use on my whiteboard.

I cut one square of black posterboard and two strips of white posterboard. You could use any brad, but I happened to have tiny ones for scrapbooking, so I used those to anchor the white strips to the black background. (I just poked a tiny hole all the way through the two layers of paper and then shoved the brad through.) I then put a piece of packing tape on the back of the brads so they wouldn't scratch my whiteboard. I grabbed an advertising magnet off my fridge (you know,...the kind you get in the mail), cut it in half, and glued one strip to each side of the back of the black posterboard. And voila...a greater than/less than/equal to tool to use on my whiteboard. 

You could use it with any magnet...including regular magnetic math manipulatives. The above photo shows a problem before it's solved, using base ten pieces. Then all the child needs to do is pivot the white strips to show greater than, less than, or equal to.


  1. LOVE this idea! Thank you for sharing!

  2. I love the brad idea! I have a symbol on my board but it is an index card that we flip. This is much better, thanks! :)

    Second Grade Math Maniac

  3. I loved the idea so much I actually made one of these for my son. To make it a bit easier to remember which way to pivot the strips, I decorated the whole thing to make it look like a little hungry monster. It's mouth is always open towards the larger quantity since it's always looking to eat some MORE.


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