Mathematics is full of interesting and special numbers. One of these numbers is Pi (π). Pi is a mathematical constant that starts with 3,14 and then continues infinitely. Since 3, 1 and 4 are the first significant numbers of the number Pi, the world celebrates Pi day on the 14th of the 3rd month every year. The mathematics department at Pecanwood College were excited to join the annual celebration this year and organised Pi day T-shirts for students and staff. During the mathematics lessons the students did team challenges and solved mathematical problems.