haha! I remember in high school when my teachers would wear shirts like that...I used to think they were so dorky, but it also made my teacher different. I think students actually like and appreciate teachers who step out of the box and are a little "different." Those are the teachers I remember most when I think back to my high school years and they are the ones that seemed to make learning math or any other subject, fun! So when a student makes a comment to me, "miss, you are weird" I take that as a huge compliment!
I found this website with some pretty funny Math t-shirts.http://www.zazzle.ca/math+tshirts