Personalized Chemistry Teacher Egghead Youth T-Shirt. Chemistry teacher text with an egghead wearing safety glasses and holding a beaker of chemicals is a humorous design for scientists, teachers and students at back to school, birthdays, holidays and graduation. 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.