Personalized Teachers Count Toddler Long Sleeve T-Shirt. Math Teachers Count 1-2-3-4-5-6-7-8-9 is a humorous twist on words and a funny gift design for birthdays, holidays and graduation. 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.