High School | Ages 14 - 18


We offer a flexible High School programme to foster a holistic and personalised education for our students in Grades 9 - 12.  All courses aim to develop successful, internationally-minded, creative and environmentally responsible individuals.

As an International Baccalaureate (IB) World School our Grade 9 and 10 students study the IB Middle Years Programme.  High School students in Grades 11 and 12 can continue with the IB Diploma programme or create their own personalised programme which can include Advanced Placement® (AP), BTEC and ISZL course options.  All options lead to the ISZL High School Diploma.

The academic programme in High School is enhanced by a variety of experiential learning opportunities, including Sports, the Arts, after-school clubs, field trips and service learning groups.

All students take part in a yearly Personal Development Week (PDW), which provides social development opportunities.  In Grades 11 and 12 the PDW focuses on community or environmental service to encourage our students to develop a positive attitude, a life-long love of learning and a commitment to both the local and the global community.


Homeroom lessons begin at 08:45 and the school day ends at 16:00.  Students can choose to join one of our after-school clubs, which begin at 16:15 and end at 17:00.

This has been my first year at ISZL and it's been fantastic. . . In my experience, all students have been friendly and helped me throughout the year

Victor, a High School student


High School facilities

High School Videos

Our student initiatives are transforming ISZL into a zero-waste, zero-carbon organisation and in 2022 we were a Top 3 finalist for the T4 World’s Best School Prize for Environmental Action.