Personalized Math Teachers Rock White Text Toddler Long Sleeve T-Shirt. Math teacher's rock in white text with a happy rock holding the numbers one, two and three, is a funny academic gift design for your favorite school teacher at back to school, birthdays and holidays. 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.