Looking for the most demanding high school curriculums

Hey guys, for academic reasons, I'm interested in finding out which high school curriculums are considered the most difficult globally. Can anyone here share their experience or knowledge?

Different high school curriculums around the world offer varying levels of difficulty and rigor. Here are some generally recognized as challenging:

1. International Baccalaureate (IB): This is a globally recognized program that provides rigorous coursework and stresses independent thinking and research. It offers both the Middle Years and Diploma Programs, the latter of which is quite challenging, with courses in six subject groups and core components including an extended essay, theory of knowledge, and creativity, activity, and service (CAS) requirements.

2. Advanced Placement (AP) Courses: These are typically offered in the United States but are recognized worldwide. They provide rigorous, college-level curriculum in various subjects. Earning high scores on these course exams can lead to college credit, depending on the policies of the university a student attends.

3. A-Levels: Primarily used in the United Kingdom, this is a subject-based qualification that can lead to university, further study, training, or work. Students usually study three or four subjects for two years.

4. French Baccalaureate: This French national-level diploma is very comprehensive and is given significant recognition, as it incorporates languages, sciences, and humanities.

5. The Indian School Certificate (ISC): This is a very challenging curriculum offered to Grade 12 students in India, covering a wide variety of subjects in significant depth.

These programs all have their unique strengths and offer robust academic challenges. It's worth noting, however, that what is 'most challenging' can be subjective and can vary greatly depending on a student's personal strengths, interests, and future goals.