Mackellar Girls Campus offers an extensive co-curricular program to both the junior and senior students.
The co-curricular program offers junior and senior modern dance ensembles, school productions, individual and group instrument tuition, school bands, instrumental and choral groups, public speaking courses, debating, and public speaking competitions, Duke of Edinburgh Award Scheme, Mock Trial and specialist camps.
Mackellar also has a comprehensive curricular and cultural excursion program which has interstate and overseas links (the school has links with five schools in Japan, including a sister-city link between Manly and Taito Ku and Odawara) and a link school in Germany.
Camps, out-of-hours and weekend activities are jointly organised with Balgowlah Boys High School.
Opportunities for students years 7-12 include the Mackellar Dance Ensembles, who perform at the Sydney North Schools and the State Dance Festival, numerous eisteddfods, NBSC's On Show, Schools Spectacular, School Musical Productions and various other performance events throughout the year.
Debating and Public Speaking
Official inter-school competitions in Years 10, 11,12. Junior Debating Club and competition, Rotary/Lions etc public speaking competitions. Warringah Eisteddfod.
Drama productions. Entry in Area and State drama festivals. Drama camps.
Duke of Edinburgh
Mackellar has had a large number of students registered in the D of E scheme over the years. Students engage in Community Service, Sport, Skills and Expeditions. Expeditions involve students and staff from the school eg. canoeing, bushwalking etc.
Involved in such programs as Keep Australia Beautiful, paper and plastic recycling, electricity usage monitoring, native gardens.
Exchange Visits and Tours
Students are invited to participate in a number of exchange programs within NSW and overseas. Coordinator provides assistance with information and organising host families. Billeting of students from other schools for languages visits, sport, performing arts, etc occurs regularly. Overseas tours by the Mackellar Community have included New Caledonia (French students), Europe, USA, and the Middle East.
Mackellar has opened an exchange relationship with Kamen Gymnasium, a high school in north west Germany.
The LOTE Department organises, and co-ordinates, many exchange visits from Japan. Students also participate in the LABO Exchange program. Welcome ceremonies and concerts involve students from Music, Dance, Physical Education etc. Students often billet exchange students from other countries. The School has special relationships with three high schools and one prefecture in Japan.
Selected students (team of 6) compete against both State and independent schools. Coach for the team is a volunteer solicitor or barrister.
Groups offered include: Choirs, Stage Band, Concert Band, Intermediate Band, String Group, Musical productions, and Music camps. Individual tuition with specialist teachers: saxophone , piano, voice, drums, flute, strings.
Students mainly from Years 8, 9 & 10 involved in testing water quality in the local catchment area. Communicate with other streamwatch students in the State and correspond globally with India, Russia etc via computer link. Work with Business/Industry Links eg. Blackmores, liaise and work with Manly Council, participate in activities such as Water Week, Industrial Waste Day.