Show your CHS pride and support the PTSO by purchasing our 30th Anniversary T-shirt. Proceeds help us recognize students, appreciate teachers and staff, and provide extras that keep our school community strong. 🐾Zeffy Fee: You will be asked to add an OPTIONAL contribution to Zeffy at checkout. It defaults to 17%. You can choose Other and enter $0.00. This is not a required fee, and it does not go to Centennial High School. Thank you!