A Level Science, Commerce and Humanities Subjects Explained

Ask a group of A Level students what they study and you'll hear the same shorthand again and again: science, commerce, humanities. The labels are useful, because they give you a rough picture of the work. They're also a little misleading, because A Level doesn't sort anyone into a group. You pick individual subjects, and the groups are just a way of talking about them. Our guide to A Level subjects in Pakistan gives the full list; this one explains what each group is actually like to study.

That matters before you commit. Two subjects can sit in the same group and feel completely different, and two subjects from different groups can ask for the same kind of thinking. We'll go through the science, commerce and humanities subjects one at a time, look at how they're assessed, and show how to read a syllabus so you can judge a subject by its content rather than its reputation. If you're also deciding how many subjects to take in A Levels, read that alongside this.

Details change between schools, exam boards and years, so treat this as a map and confirm specifics with your school and the official syllabus for each subject. You can browse every subject on our A Level subjects page as you read.

What Subject Groups Mean at A Level

If you've come from the FSc system, you may be used to fixed streams, where the group decides most of your subjects. A Level works the other way round. There's no Pre-Medical or Pre-Engineering track on the certificate. There are just subjects, each with its own syllabus and exams, and the three or four you choose are yours to combine.

Groups still earn their place in conversation. Schools often arrange their timetable around them, universities talk about "science subjects" or "business subjects" when they set requirements, and students use them to find friends who are studying similar things. Just remember what a label can and can't tell you.

• What a group tells you. The usual type of content, the kind of practice you'll do most weeks and the degrees it often leads towards.

• What it doesn't tell you. How hard a particular subject is, how it's marked, or whether you'll enjoy it. Those depend on the syllabus and on you.

• Why it's worth knowing. It helps you notice when a combination is lopsided, for example four subjects that all need long essays, or four that are all calculation-heavy.

Science Subjects: What the Work Is Like

Science subjects share a way of working. You learn a body of ideas, then use them on problems you haven't seen before. Most also include practical work, which is assessed in one form or another, so a science student spends time in the lab as well as at a desk. Within that shared approach, though, each subject has its own temperament.

Physics and Mathematics

Physics is about modelling the world with equations and then testing the model. The questions often hand you an unfamiliar situation and ask what the principles predict. Mathematics is the most self-contained of the group: topics build on each other, and a gap in algebra or calculus will keep showing up until it's fixed. Students who enjoy the two together often find each helps the other, since much of the physics is applied maths.

Chemistry and Biology

Chemistry mixes calculation with a great deal of detail to organise, especially in organic reactions. Biology leans harder on recall and on writing precise explanations, with the wording of an answer often mattering as much as the idea behind it. Neither is the easy option, but they stress different muscles: Chemistry rewards patterns and practice, Biology rewards memory and careful expression.

Computer Science

Computer Science sits between science and mathematics. You'll study how computers work and how data is represented, and you'll also write and trace programs. It suits people who like logic puzzles and are happy to work through a problem step by step, and it can feel a lot more demanding than it looks if you've only used computers, not built anything with them.

Commerce Subjects: What the Work Is Like

Commerce subjects look at how organisations and economies work. The shared skill is applying ideas to a specific situation: a company in difficulty, a market with a price rise, a set of accounts that don't balance. Unlike the sciences, where there's often one correct answer, many commerce questions ask you to make a judgement and justify it.

Accounting

Accounting is the exact one. You record transactions, prepare financial statements and analyse them, and the numbers either reconcile or they don't. People who like tidy methods and find satisfaction in a figure that finally balances tend to take to it. People who rush lose marks to small slips.

Business

Business covers how firms are organised, marketed, financed and managed. Much of the assessment is based on case material, so the skill that matters most is using the details of the case in your answer instead of writing generally about business. It rewards students who write in a structured way and can weigh up options.

Economics

Economics sits closest to the sciences in this group, because it uses graphs, models and data, and some students find it needs a comfortable grip on basic mathematics. It also asks for extended written evaluation, so it blends the two sides of the commerce group: the model-building of one and the argument of the other.

Humanities and Social Science Subjects: What the Work Is Like

Humanities and social science subjects are built around reading, argument and clear writing. You're expected to weigh evidence, compare viewpoints and reach a reasoned conclusion, usually in essays or extended answers. The marks go to the quality of the reasoning, so a student who can organise an argument often does better than one who has simply memorised more.

Sociology looks at how society works through research methods and theories, and it asks you to evaluate those theories rather than only describe them. Psychology, Law, History and English Literature, where your school offers them, follow the same pattern with different material: studies and explanations in Psychology, legal principles and cases in Law, sources and interpretations in History, and texts and their language in Literature. English Language, covered on our English Language page, adds analysis of how writers use language.

The common misconception is that this group means less work. The load is different, not lighter. Instead of a problem set, you get a reading list and an essay, and essays are slow to write well. A humanities student needs to be comfortable reading a lot, writing at length and having their arguments challenged.

The Three Groups Side by Side

Here's a quick comparison of what the work usually looks like. It's a generalisation, so use it to spot patterns, and check the syllabus for any subject you're seriously considering.

How This Compares With FSc Groups

Many Pakistani students think of their choices as Pre-Medical, Pre-Engineering, Computer Science, Commerce or Arts. The A Level equivalents aren't fixed packages, but they map loosely. A student aiming for medicine will usually include Biology and Chemistry. Engineering often points to Mathematics and Physics. Business and finance tend to involve some mix of Mathematics, Economics, Business or Accounting.

The difference is flexibility. An FSc group fixes the subjects for you, while A Level lets you build your own set and cross between groups. That freedom is useful, and it also puts more responsibility on you to check what your target degree needs. If you plan to study in Pakistan, remember that A Level results are converted through the IBCC equivalence process, which you can estimate with our A Level equivalence calculator.

Mixing Groups: Combinations That Cross Over

One of the better things about A Level is that you aren't boxed in. Some of the most useful combinations take subjects from more than one group, and they can open doors that a single-group set would close.

• Mathematics with Economics. A common pairing for finance, economics and data-driven degrees. Each strengthens the other: the maths helps with models and graphs, and the economics gives the maths a purpose.

• Biology with Psychology. Useful for people interested in the brain, behaviour or healthcare, since the two overlap on human biology and research methods.

• Computer Science with Business. Relevant for technology and business roles, and it pairs the building side of technology with the organisational side.

• Physics with Economics. Less common but workable for students who like modelling and are weighing engineering against business, though it needs a good grip on mathematics.

Two warnings come with this freedom. First, your school has to be able to put the subjects on the same timetable, and not every cross-group combination fits. Second, universities may ask for specific subjects, so a creative set that misses a requirement can cost you more than it gains. Our guide to how many subjects to take in A Levels covers the timetable and requirements side in more detail.

Reading a Syllabus Before You Choose

The best way to tell what a subject is really like is to read its syllabus, which is the document that defines what's taught and tested. Most students never open one before choosing. A few minutes with the syllabus tells you more than any label, because it shows the content, the style of exam and the skills the board is looking for.

• 1

  Find the right syllabus. Check the exam board and the subject code. The same subject can differ between boards, so make sure you're reading the one your school uses. Our A Level syllabus pages list the codes.

• 2

  Read the aims and assessment objectives. These say what the subject is trying to build, such as knowledge, application or evaluation. A subject heavy on evaluation will feel different from one heavy on recall.

• 3

  Scan the content list. Look at the topic headings. If most of them sound interesting, that's a good sign. If you wince at half of them, take that seriously.

• 4

  Study the assessment structure. Note how many papers there are, how long they last, and the question types. Is it mostly essays, calculations, case studies, practical work or a mix?

• 5

  Look at command words. Words such as describe, explain, calculate and evaluate tell you what the examiner wants. Compare them across the subjects you're considering.

• 6

  Test it with a past paper. Open a recent paper, read the questions and imagine writing the answers. If that sounds tolerable, you're probably choosing well.

Our past papers pages make the last step easy, and the topics pages show what each subject covers.

What Each Group Asks of Your Week

Workload isn't just about hours. It's about the kind of work, and whether it suits you.

• Science weeks tend to be built around problem sets, lab write-ups and revising definitions. The work is concentrated: a set of questions can take an evening, and a gap in understanding shows quickly.
• Commerce weeks mix calculations with case studies and short written responses. There's a steady flow of practice questions and a lot of value in learning to structure answers.
• Humanities weeks involve a lot of reading and a regular essay. The tasks are fewer but longer, and the deadlines can bunch up if you don't plan for them.

A balanced combination mixes the kinds of work, so you aren't doing four essay subjects at once or four problem-heavy ones. If you want a closer look at how study time splits across subjects, our guide to how many subjects to take includes a sample week.

Matching a Group to the Degree You Have in Mind

Starting from the degree makes the group choice much easier. These are general patterns, not rules, and universities set their own requirements, so always check the ones for the course and country you're aiming at.

• Medicine and health sciences. Usually need Biology and Chemistry, often with a third subject chosen to fit the university's list.

• Engineering and technology. Often ask for Mathematics and Physics, sometimes with Chemistry or Computer Science depending on the branch.

• Business, finance and economics. Vary widely. Mathematics helps for some of them, and Economics, Business or Accounting are common, but check each course.

• Law, social sciences and the arts. Often flexible on subjects, but may expect strong essay writing, so a humanities subject is a natural fit.

Myths That Distort the Choice

• "Commerce is the easy option." It isn't automatically easier. Accounting punishes careless arithmetic, Economics needs graphs and evaluation, and Business needs well-argued case answers.

• "Science is the only serious route." Many degrees and careers value humanities and commerce subjects, and a strong set in the area you enjoy usually serves you better than a weak set in one you don't.

• "You have to stay inside one group." You don't. Mixing is allowed, and sometimes it's the best route. Just check requirements and timetable fit first.

• "The subject with the best-known name is the safest." A familiar name says nothing about whether you'll do well in it. Your interest, your O Level results and the syllabus are better guides.

Mistakes to Avoid When Choosing a Group

• 1

  Choosing by label alone. Reading "science" or "commerce" and stopping there. Read the syllabus before deciding.

• 2

  Copying what friends picked. Their strengths and plans differ from yours, so a good set for them might be a poor one for you.

• 3

  Overloading one kind of work. Four essay subjects or four calculation subjects can wear you down faster than a mixed set.

• 4

  Ignoring your O Level results. Your grades in the related O Level subjects are an honest early signal of where you'll find the work manageable.

• 5

  Forgetting the requirements. Choosing a group you like and discovering later that a target degree wanted a different subject.

Questions to Ask Before You Commit

• Which exam board does the school use, and which syllabus code applies to each subject?
• Can my chosen subjects, including any from different groups, be taken together on the timetable?
• How are my subjects assessed, and how many papers and practical components are there?
• What do the universities I'm considering require, and which subjects do they prefer?
• How much choice do I have if I want to change a subject after the first year?

Preparing Once You've Chosen

Whichever group you land in, the habits that work are similar: keep up with the syllabus, practise the kind of question your subject asks, and learn from your mistakes. Science students should do problems regularly and not just read them. Commerce students should practise structuring case answers. Humanities students should practise planning and writing essays under time.

Our A Level practice pages and A Level questions help with regular practice, and our AI exam preparation guide shows how to use AI for revision without handing over the thinking. Using A Level past papers as exams approach shows you how your subject's questions are actually worded.

Final Thoughts

Science, commerce and humanities are good starting words, but they're only a map of the territory. The real decision is about particular subjects: what they ask of you, how they're assessed, and whether they lead where you want to go. A few minutes with a syllabus and a past paper will tell you more than any label.

Use the groups to check that your set has a sensible balance, then use the syllabus to check each subject on its own. When you're ready to compare the full range, our guide to A Level subjects in Pakistan lists them all, and our article on how many subjects to take in A Levels helps you settle on the number.