Let's just say...math isn't really my thing and I was failing pre-calc in HS. Week before parents night, my teacher proposed to the class a chance for extra credit. Make a nice "math poster" for her to hang up on the walls and you'll get the credit. We'll I wasn't about to write out a math formula in bubble letters - Here is my poster, compelete with the first page of notes in that class. And, yes, I got the extra credit. My teacher loved it.