The southern campus was the original site which contained an auxiliary administrative office as well as music, industrial technology, applied science classrooms and languages.

[7] A year 12 student has secured $100,000 to add solar panels on the roof of the school hall, which is expected to create annual savings of $18,000.

[8] One of the key programs the school's environmental committee "Greenedge" has undertaken is the Outdoor Learning Centre (OLC).

[10] Caringbah High School provides various extra-curricular activities, such as public speaking, debating, Tournament of Minds and HSC distinction courses.

Caringbah fields many sporting teams which compete in many sports including water polo, rugby league, soccer, cross country running, lawn bowls, field hockey, mountain biking, tennis, cricket (boys and girls) and squash.

It has undertaken activities such as upgrading light switches to energy efficient timers, introducing a worm farm system, and a school garden.

In 2014, and 2018 a team of Year 10 students won the grand final of the Les Gordon History Debating Competition.

[13] Caringbah High offers the Duke of Edinburgh Award program as a co-curricular activity.

[15] Newspaper clippings of the Duke's visit are on display in the Caringbah High School Library.