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Monday, February 6, 2012

Rounding

For rounding lessons, I have often found that printed number lines work to a certain extent, but after that, the students need something that can be changed according to the problem that they are on.
Here is one example of a number line that kids can write on and erase when they need to change the numbers.
I usually make copies, then we insert them in sheet protectors or laminate them, so that they can be used repeatedly with dry erase or transparency markers.
A colleague of mine started to write the numbers at the top, with the arrow indicating to round up if the number is 5 or higher.  Some kids like this visual to be vertical, some work better with it horizontally.  Eventually, they will write it in themselves.

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