So, when I was in 10th grade, I had Algebra 2 with a teacher who had a habit of making math more boring than it really deserved to be. One day, he was trying to teach a lesson on some sort of linear method- I wasn’t paying much attention (neither was the rest of the class, now that I think about it)- and was using two markers, a red one and a blue one, to show which sections of the graph belonged with which equation. Half way through the lesson, he stops and asks, “What do you get when the red shaded area and the blue one cross each other?” Of course, without even thinking, I blurt out, “Purple!” No one ever found out that it was me, and to this day I have never again pulled off such a perfect poker face.
Classroom - Graph the Rainbow (via collegehumor)