Baulkham Hills High School (colloquially known as Baulko) is a government-funded academically selective co-educational secondary day school, located in Baulkham Hills in the Hills District of Sydney, New South Wales, Australia. The principal is Wayne Humphreys. Consistently ranked as one of the state's top schools academically, the school was ranked second in the NSW Higher School Certificate in 2016, 2017 and 2020, ranked fifth in 2018, and ranked third in 2021. In 2010, the school was ranked the most popular school in NSW for high school applications. History Baulkham Hills High School was established in 1971 as a public comprehensive high school. It was officially opened on 23 March 1974 by the then Governor, Sir Roden Cutler. For the first year, students and teachers at the school were relocated to nearby Castle Hill High School whilst Baulkham Hills High School was still under construction. The school's first selective cohort was in 1990, with all grades being selective by 1995. The school was built on the site of a former orange orchard, with the region having once been a major orange producing area of Sydney. This history is acknowledged by the use of an orange on the school logo. The use of the word "Persevere" as the school motto encourages students to persevere in all their studies."The school emblem consists of the school name and the motto "PERSEVERE". It also shows an orange, as Baulkham Hills area was one of the main orange producing areas of the State, with the school being built on a former orange orchard."Acknowledgement of the agricultural history of the area is also reflected in the naming of the four intramural sports houses of the school, which are named after four prominent early European settlers in the area: MacDougall (red), Suttor (blue), Meehan (yellow) and Hughes (green). Admissions and Enrollment Total enrollment in junior years (Year 7 to Year 10) is approximately 180 students per year group, and around 200 per year group in senior years (Year 11 and Year 12), due to transfers from other schools. the total enrollment was 1,230 students. As a selective school, entry into the school in Year 7 is based upon results in a statewide examination known as the Selective High Schools Test. In 2020, the lowest admitted score was 234 out of the maximum 300. Entry into vacant places in later stages is based on a reserve list and other