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Focus on three main things:

1. Personal strength: Pick subjects where you already perform well. It's easier to stay motivated over three years in a subject you actually enjoy.

2. University requirements: Check university entry guidelines early. Programs like Engineering, Business, or Science often require specific electives (like Physics or Chemistry) or Math Extended Modules (M1/M2).

3. Workload balance: Mix heavy reading or essay-based subjects with practical or math-heavy ones so your study routine stays manageable.

Dropping a third elective during MS3 or MS4 is common if you want to focus energy on your core subjects. However, switching to a completely new elective after MS3 starts is usually not recommended because you would miss a year of foundation work.

It depends on how you learn best. 

• HKDSE suits students who do well in end-of-stage written exams and prefer a clear, syllabus-driven approach. It offers a direct pathway to local universities through JUPAS.

• IBDP fits self-directed students who thrive on continuous coursework, independent essays, and open-ended research. It is ideal if you are aiming for overseas universities or non-JUPAS admission.

Taking 3 electives gives you flexibility—if one subject proves too tough in MS3, you can drop it without risking your minimum university entry count. Many JUPAS degrees also calculate scores using your top 5 or 6 subjects, so a third elective can help your overall score. M1 and M2 act as specialized math electives that satisfy requirements for specific STEM, business, and finance majors.