Personalized Pop Quiz Sister Best Teacher Long Sleeve T-Shirt. Forget the chalkboard. Funny teacher appreciation Long Sleeve T-Shirt - Black with apple and pencil will express love and support for your favorite educator teacher says POP QUIZ WHO'S THE BEST TEACHER? MY SISTER. 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