Personalized Funny Math Teacher Long Sleeve T-Shirt. Funny Math Teacher design shows all the stuff we do each day but MATH is at the top of the list when you love to teach and it comes on a Long Sleeve T-Shirt - Black gift. Pre-shrunk 100% cotton 6.1 ounce long sleeve t-shirt. Double-needle stitched neckline and sleeves. Quarter turned. Shoulder-to-shoulder taping. Adult: S, M, L, XL, 2XL, 3XL