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Today we created a 3-d grid in our classroom with toilet paper and a plastic rod from the blinds! My students had been having a particularly hard time visualizing the 3-d grid on 2-d paper. This seemed to help a lot, and it was fun! You can't see it in the photo, but a student is holding an "X" sign for the x-axis and another student is holding the "Y" sign for the y-axis. I even had the kids tell me the coordinates of the clock based on our 3-d grid. Graphing on 2-d paper was a lot more successful after doing this activity.

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