Tuesday, February 01, 2011
Teaching The Sine Graph
I still get requests for the file I used to teach the sine graph WAY back when in the days I taught precalculus (side note: I'll be teaching it again at my new school next year). This is an idea (I forgot where I heard/saw it from) that I wrote up. It involves string, spaghetti, and the worksheet. The kids use the string to wrap around a circle to mark off random angles/marks on the circle. They transfer this to the "linear" xy plane. Then at these angles, they measure the y value on the circle with the spaghetti and transfer that height over to the linear graph. Kids should have prior knowledge of radians, calculator/triangle practice with calculating sine (I forget what else....). Here's the file.