Perpendicular Lines “… flip it and reverse it…”

15 Nov

This is Missy Elliot. She will help us w/ our lesson today on perpendicular slopes. (If you don’t know this song, no worries, all your kids do. And if you really don’t, it will be SOOOO much cooler if you still sing/ rap the lyrics at the end!!)

  1. Give each group/pair 1-3 lines to graph.
  2. Teach them what perpendicular means.
  3. Have them pick one nice point on the line and graph a line perpendicular to their original line.
  4. Ask them to figure out what the relationship between the slopes are of their two lines.
  5. When students look like they’re on step 4, start playing the pertinent part of Missy’s song on repeat (only up to 0:40 in this Youtube video). Point out that this is their big hint. Start singing the important part around the 3rd time (“put your thang down flip it and reverse it…”)
  6. Wait for the big “OHHHH… I get it!” to start spreading throughout the room.
WARNING: The song is quite dirty. I really mean it when I say only play the pertinent part, especially since we’re asking them to listen to the lyrics for the hint… Also, I wouldn’t recommend actually showing the video. Too much of a distraction.

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