Established in 2001, the High School has developed into a thriving and dynamic learning environment, which builds on the successes of the Primary School and helps prepare students for higher education and the world of work. Students in the High School can be assured an exciting and stimulating learning experience with a broad curriculum .

The High School curriculum is based on the English National Curriculum and rooted in the best of the multiple intelligences with motive sensory learning practiced and suit the needs and experiences of the students, developed and adapted to international context. High School classrooms, like those in the Primary School, are lively, are challenging, places of learning. The students enjoy coming to school, are excited by their learning experiences and are encouraged to achieve their full potential in all areas.

St Andrew's is committed to a holistic approach to education and operates a flourishing extra-curricular activities programme to help every child at the school develop their skills, to stimulate a healthy mind and body and, importantly, to have fun. A strong student welfare programme, with form tutors and the Tutorial programme at its heart, aims to ensure that every student is happy, healthy, confident and tolerant.

In line with the British school system, the High School curriculum consists of three Key Stages:

Key Stage 3 it the term for Years 7-9, which builds on the work undertaken in the Primary School and develops and deepens the students' learning experiences.

Key Stage 4 consists of Years 10 and 11, where the students study a range of core and optional IGCSE courses.

Key Stage 5 is the term for the Senior Studies Programme in Year 12 and 13 where St.Andrew's students study the IB Diploma to prepare them for entry into prestigious universities and colleges around the world.