Historically, Castle Hill High School has demonstrated strong participation in extracurricular activities, including sport, musical production, leadership, technology and public competitions.
Sporting Castle Hill High School holds various sporting events including Cross-Country, Swimming and Athletics Carnivals, where students can compete for participation in wider regional competitions, consisting of Zone (representing the school), Regionals (representing Hills Zone) and Combined High Schools (representing Sydney West). The school formerly competed against
Crestwood High School in the Brewer Cup.
Academics Castle Hill High School participates in the following inter-school academic competitions: •
Robocup • The Premier's Debating Challenge • Australian Mathematics Competition • Da Vinci Decathlon
Student Leadership • The Student Representative Council (SRC) – A group of junior students elected by their peers to represent the school and help with the organisation of events. • Peer Support Leader – Year 10 leaders who assist new students settle into the school. • The Prefect Body – Year 11 and 12 students who represent the school and organise events. • The Sport's Council – a group of Year 11 and 12 students tasked with facilitating sporting events such as the annual carnivals. • The CAPA Council – a newly created body of Year 12 students oriented towards promoting the values of the performing arts within the school. == Notable alumni ==