Personalized Best Teacher Fish T-Shirt. T-Shirt - Light Blue with cute and colorful school of fish says WORLD'S BEST TEACHER. Teacher fish is leading the way. Perfect teacher appreciation gift for your favorite educator. Everyone loves our Custom T-Shirts! Wardrobe essential for looking good, 24/7. 5.0 oz., pre-shrunk 100% cotton. Seamless 1x1 rib collar. Shoulder-to-shoulder taping. Double-needle stitched sleeves, bottom hem and front neck. Note: greys are a cotton/polyester blend.