Personalized Math Teacher Teaching Long Sleeve T-Shirt. Cute Math Teacher Long Sleeve T-Shirt - White has colorful sunflower logo. art c. Ne' Metzer. 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