Personalized Teaching Smile Long Sleeve T-Shirt. Teaching makes me smile with a smiling face made of the word teaching is a humorous gift design at back to school and graduation. 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