The decision most students get wrong
The IB Diploma requires three (occasionally four) subjects at Higher Level and the rest at Standard Level, spread across the six subject groups. A lot of students pick their HL subjects based on whichever ones they enjoy most, or found easiest at the start of the Diploma. That's a reasonable starting point, but it skips over two things that matter just as much: what universities actually ask for, and how much extra work HL genuinely is.
Check university requirements before you commit
If you already have a target degree in mind, check its IB subject requirements early. Plenty of competitive courses, Medicine, Engineering, Economics and others, specify minimum HL grades in particular subjects, not just an overall points total. Skip this check and you can end up discovering, partway through Year 12 or its equivalent, that a subject you took at SL needed to be HL all along, by which point switching is difficult or impossible.
HL isn't just "the same content but harder"
HL subjects add genuinely new content: whole extra topics that SL students of the same subject never see, not just harder questions on the same material. Maths, the sciences, and several humanities subjects on the Diploma all work this way. HL is SL plus an extension, not SL with a difficulty multiplier. That matters for workload planning: an HL subject isn't 20% harder than SL, it's closer to an extra course's worth of content stacked on top.
Spread your three HL subjects across different skill types
Take three HL subjects that all demand the same kind of thinking, say, three heavily essay-based humanities, or three heavily mathematical sciences, and you've stacked your hardest deadlines and your hardest revision load into the same task at the same time. Most students find it more sustainable to mix HL across different skill types: one essay-heavy humanity, one quantitative science, one language or arts subject. That way a brutal week in one HL subject doesn't automatically mean a brutal week in all three.
Look at your genuine strengths, not just your current grades
Getting a strong grade in a subject right now doesn't automatically make it the right HL choice, especially if that strength is built on content that won't extend cleanly into the HL-only material. Ask your subject teacher directly whether your strengths so far, strong factual recall versus strong extended analytical writing, actually map onto what the HL extension demands.
It's rarely too late to ask, even after choosing
Already partway through the Diploma and unsure about an HL choice? Raise it with your Diploma coordinator and subject teacher directly. They've seen this exact situation many times and can tell you what changing, or not changing, realistically looks like at your stage, instead of you guessing on your own.
Revising HL and SL content with ExamPass.ai
ExamPass.ai generates exam questions by topic and exam papers for both HL and SL versions of supported IB subjects, pitched at the right depth for your tier, so your practice questions reflect the actual extension content (or lack of it) your tier requires, rather than a generic version of the subject.