Personalized Pop Quiz Sister Best Teacher Toddler Long Sleeve T-Shirt. Forget the chalkboard. Funny teacher appreciation Toddler Long Sleeve Tee - Heather with apple and pencil will express love and support for your favorite educator teacher says POP QUIZ WHO'S THE BEST TEACHER? MY SISTER. A classic for Fall, Winter and Spring, these long sleeve toddler t-shirts are sure to be a staple in your child's wardrobe. Whether layered or alone, this t-shirt is soft yet durable enough to stand up to your toddler's playtime demands.