Draw a horizontal and vertical axis that intersects at their origins. Again, the horizontal axis is the x-axis here and the vertical axis is the y-axis here. With your 3X3 post it sheets, make a "cartoon" of the x-axis moving toward the y-axis from one side and then from the other. Next, do the same with the y-axis moving toward the x-axis from one side and then from the other. Now, using your colored pencils, make the x-axis one color, and the y-axis another color. Next, make two "cartoons" in which one shows the x-axis rotating around the y-axis as the whole configuration moves up and then down in the motion of an upside down "U", while the other "cartoon" show the y-axis rotating around the x-axis as the whole configuration moves up and then down in the motion of an upside down "U."
The purpose of this is to show that directorals (indicators of direction) may partially and wholly differentiate, and this may happen from either a static or from a kinematic basis.
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