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# Inequality vs. Interval Notation Posters

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Help your students see the connections between the inequality symbols, the choice of open/closed points on a number-line, and the choice of soft/hard brackets in the interval notation. I encourage you to use the color-coded version so your students can ask themselves, "Can I include this point?" Green="yes, include", and red="no, exclude." The color-coding follows "stoplight logic" that even your students who struggle the most most understand. Additionally, the color makes it easy to make connections between representations.

These posters print on legal sized paper (8.5x14").

If you want, you can print them on letter sized paper by selecting "fit" under "size options" on your printer menu, although this will not look quite as nice.

ADDITIONALLY, you can cut up the 36 rectangles on the grid and use this as a triples activity in your class! Hand one rectangle ("card") to each student (if there are fewer students, ask your class "who wants another piece?"--I always seem to have a bunch of volunteers because this means they'll get to talk to more people!). Students will then find the two other classmates who have representations equivalent to their own card. Once a triple has been found, students will check their cards with the teacher. If they are correct, they will move around the class to help the remaining students. If they are incorrect, they will review, as a group of three, which card(s) in their triple didn't belong and then go back to finding the equivalent representations.

©Math by the Mountain, 2016
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2
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