Personalized Best Teacher Ever Youth T-Shirt. Best Teacher Ever! Pow! Ka-boom! If you know a teacher who is a superhero, this is a great gift for them! Let them know they are the best teacher ever! Let the good times roll in a durable T-Shirt that takes kids from school to play in an amazing array of colors. 5.0 oz., pre-shrunk 100% cotton. Seamless 1x1 rib collar.