The Grade 11-12 Courses provide a specified and flexible education giving students an adaptable education. 

Students who may not wish to undertake the full International Baccalaureate (IB) Diploma Programme (DP) may opt to study some individual subjects, earning a certificate for each subject successfully completed. This pathway offers students a flexible and balanced way to earn a high school diploma while still benefiting from the rigour of IB academics. 

Grade 11-12 courses develops strong critical thinking, writing, and analytical skills, and many higher education institutions recognise the value of this pathway, leading to, in some cases,  universities offering credit for high exam scores

Students are able to augment IB DP courses with a range of online courses. All online courses must be pre-approved to ensure they meet the required standard to earn a credit towards the ISL High School Diploma. These courses allow for students with a wide variety of learning profiles and backgrounds to be accommodated for. 

All students at ISL have the potential to earn a High School Diploma by successfully completing various courses over a four-year period (Grades 9 – 12). The ISL High School Diploma is the equivalent to a North American High School Diploma and is accepted by many universities worldwide as an entrance qualification.