u/CourseMediocre2258 — reddlx

In Part 1, I talked about when to start preparing and why early planning matters. Now I want to get into something more specific - how to choose the right subjects.

The subjects you choose at IGCSE directly shape what you can take at A-Level, and your A-Level subjects are what universities scrutinise most.

IGCSE

At IGCSE level, you'll have 3 compulsory subjects: Mathematics, Science, and English plus 2 subjects of your choice. At minimum, you'll need to pass 5 IGCSE subjects in total.

English

You should opt for First-Language English in your IGCSE. If you achieve a Grade B or above, most UK universities will waive additional English language requirements like IELTS or TOEFL saving you time, money, and a significant amount of stress.

Science

Depending on your target course, you'll need to choose between three types of science qualifications. The key differences come down to depth and how many IGCSE subjects each one counts as:

Single Sciences (Highest difficulty): Chemistry, Physics, and Biology are each taught separately and in significant depth. These count as 3 individual IGCSE subjects and send a strong signal to universities about your academic rigour.
Coordinated Sciences (Medium difficulty): All three sciences are taught together but still covered in considerable depth. This counts as 2 IGCSE subjects (Double Award)
Combined Sciences (Lowest difficulty): All three sciences are taught together but with less depth. This counts as only 1 IGCSE subject (Single Award)

The right choice depends on the degree you're aiming for. If your course requires science at A-Level, Single Sciences will give you the strongest foundation.

Mathematics

There are two streams:

Core Mathematics: the easiest, most basic level of mathematics.
Extended Mathematics: slightly more challenging, with additional topics.

If you're planning to study a quantitative degree such as Economics, Finance, Business, or Actuarial Science, Extended Mathematics is compulsory; it builds the essential foundations you'll need for A-Level Mathematics. And even if your degree isn't quantitative, it is still highly recommended, as it signals strong analytical thinking to admissions teams and makes your application more competitive.

Why Your IGCSE Choices Matter More Than You Think

Universities rarely spell out exactly which IGCSE subjects they want on their course pages but that doesn’t mean they don’t matter.

Your IGCSE subjects are the building blocks of everything that follows. The goal is simple: by the time you reach A-Level, you want to be deepening knowledge, not scrambling to fill gaps. Choosing your A-Level subjects first, then working backwards to ensure your IGCSEs align, is the smartest way to set yourself up.

A Note on IGCSE Grades

A-Levels carry more weight in your university application.

Admissions officers want to see how you've grown. Your IGCSE results give them a baseline, and your A-Level results show the trajectory. A strong upward journey from IGCSE to A-Level tells a compelling story about your development as a student.

It's also worth understanding how IGCSE grades are awarded overall. Individual subjects are graded A* to G, but the broader Cambridge ICE (International Certificate of Education) group award which is based on your total performance across seven subjects is what earns you one of three distinctions:

Distinction: Grade A or higher in five subjects, and Grade C or higher in the remaining two.
Merit: Grade C or higher in five subjects, and Grade F or higher in the remaining two.
Pass: Grade G or higher in all seven subjects.

When applying to UK universities, you'd ideally want to be achieving at Merit or Distinction level. It won't make or break your application on its own, but it sets a strong foundation and shows admissions officers that you arrived at A-Level well prepared.

What If You Haven't Taken the Same Subject at IGCSE?

I mentioned earlier that choosing A-Level subjects that align with your IGCSEs gives you a head start. But not every A-Level subject has a direct IGCSE equivalent, and sometimes you simply didn't take that subject at IGCSE. If that's you, there's no need to panic.

What it does mean is that you'll need to work a little harder to close the gap.

Here's something worth understanding: even students who did take the same subject at IGCSE find A-Level a significant step up. If IGCSE is step 1, A-Level is step 5. The jump is steep regardless of your background. The difference is that without the IGCSE foundation, you're starting from further back — so you'll need to be more proactive from day one.

That means:

Revising foundational concepts from scratch before or alongside your course
Doing past papers regularly and early, not just before exams
Staying consistently on top of the material rather than letting anything accumulate

A-Level is where your studies shift from broad learning to genuine specialisation. It demands your full focus and consistent effort throughout, not just in the final stretch.

A-Levels: Understanding Entry Requirements

Once you've identified the universities and courses you're interested in, go to the course page and find the "Entry Requirements" section. This tells you which A-Level subjects are expected and the minimum grades required. These are non-negotiable.

But here's what many students miss.

Universities don't only check whether you have the required subjects. They also look at your broader subject combination and how coherently your choices reflect the course you've applied to and your future goals. This is where strategic thinking really pays off.

Take BSc Economics as an example. A university might require A-Level Mathematics at Grade B or above and IGCSE English Language at Grade C or above. Both must be met — neither is optional. But beyond those compulsory elements, a strong subject combination might look like:

Mathematics, Further Mathematics, and Economics

This combination tells a clear story about you're serious about the subject, you've challenged yourself mathematically, and your choices are all pulling in the same direction.

Take One Extra Subject in Both Sets — Just in Case

You need a minimum of 5 IGCSEs and 3 A-Levels. My strong recommendation is to take 6 IGCSEs and 4 A-Levels as a safety net. If one subject doesn't go the way you hoped, you still have enough to move forward. Universities will only consider your top 3 A-Level results anyway, so the fourth subject gives you protection without working against you.

That extra subject is also a great opportunity to think about your Plan B. Things don't always go to plan, and having a backup degree in mind gives you options rather than leaving you stuck. For example, if your Plan A is Economics but your Plan B is Biology, you could use that extra subject to keep both doors open. Your combination should still tell a coherent story centred around your Plan A but where you have a free choice, it's worth asking: does this support where I want to go, and does it give me a landing spot if things change?

Watch Out for Complementary Subjects

This is something not many people talk about, but it matters. Some subjects have heavily overlapping syllabuses, and when that happens, universities will typically only count one of them.

A classic example is Business and Economics. If you take both, only one will be considered and it will be the one directly related to your degree. Taking Business alongside Economics hoping it'll add weight to your application won't work. You'd be spending revision time on a subject that doesn't meaningfully strengthen your case.

Before finalising your choices, check whether any two subjects you're considering have significant syllabus overlap. It's an easy thing to avoid once you know to look for it.

Avoid "Soft" Subjects Unless They're Relevant to Your Degree

Some subjects are considered less academic and more vocational — things like Art & Design, Sociology, or Media Studies. These are sometimes referred to as "soft" or "non-traditional" subjects.

Unless you're specifically pursuing a degree in one of these fields, most competitive UK universities will look less favourably on them. They won't necessarily disqualify you, but they can weaken an otherwise strong application. Stick to subjects that are clearly academic and directly relevant to your chosen course wherever possible.

A Useful Resource for Choosing Your Subjects

One website I'd strongly recommend bookmarking is Informed Choices; A resource put together by the Russell Group, (collection of 24 of the UK's top research universities including institutions like Oxford, Cambridge, LSE, and Exeter) You can search by degree and see which A-Level subject combinations are considered strong for that course. It's a practical, reliable starting point when you're mapping out your choices.

One Last Thing: Look at Past Papers After You've Chosen Your Subjects

Once your subjects are locked in, it's worth pulling up a few past papers for each one. You don't need to attempt them. It'll give you a real sense of what you'll be studying, how deep the content goes, and what the exams actually look like. That awareness helps you plan your revision approach from the very beginning rather than being caught off guard later.

Here are a few websites where you can find past papers:

One important note: do this after you've made your choices, NOT before. Looking at A-Level past papers before you're committed can be genuinely intimidating, and there's a real risk it pushes you towards easier or less relevant subjects for the wrong reasons.

My honest view? If a subject is what you need for the degree you want, the difficulty isn't a reason to avoid it, it's something to prepare for. Go big or go home.

In Part 3, I'll be diving into the personal statement — the one piece of your application that's entirely in your control.