Counting the days with a formula twist! Our 'Math Formula 100 Days Of School' tee is a fun choice for elementary school, pre-K, and kindergarten students. A creative present for math teachers, adding laughter to the 100th day celebration. Celebrate the 100th day of school with our funny tee. 'Math Formula 100 Days Of School' is a perfect present for math teachers or students and a playful addition to the wardrobe of elementary school, pre-K, and kindergarten students. Lightweight, Classic fit, Double-needle sleeve and bottom hem