Personalized Math Teaching Chick Text Youth Long Sleeve T-Shirt. Math teaching Chick in curly text with a cute yellow chick holding a book titled, Everything You Need To Know About Math, is a humorous gift design for back to school, birthdays, holidays and graduation. youth long sleeve t-shirt. Shoulder-to-shoulder taping. Youth: S(6/8), M(10/12), L(14/16), XL(18/20)