A-Levels explained

What A-Levels are

A-Levels are the main academic qualification students take after GCSE or IGCSE, usually between 16 and 18. They are the standard route into UK universities and are recognised everywhere.

Like the IGCSE, the A-Level is a set of single-subject qualifications, not one combined certificate. A student takes a small number of separate A-Levels and gets a separate grade in each.

In the English system this is the sixth form, Key Stage 5, the two years after the IGCSE or GCSE year. Internationally it is usually called Year 12 and Year 13, or Grade 11 and Grade 12.

The defining feature is depth over breadth. Where the IB Diploma keeps six subjects running, A-Levels narrow to a few subjects studied much harder. That trade is the thing to understand before choosing them.

The AS and A2 structure

An A-Level runs over two years. The first year is the AS year, the second is the A2 year. What that means in practice depends on where the exams are set, and this is where parents are most often confused.

• In England, A-Levels are now linear. The AS has been separated from the A-Level. Almost all the assessment is by terminal exams at the end of the two years, and a standalone AS taken in Year 12 no longer counts toward the final A-Level grade.
• International A-Levels, set by boards such as Cambridge International Education and Pearson Edexcel and used by most international schools, commonly keep the modular AS plus A2 structure. A student sits AS exams at the end of Year 12, those marks carry forward, and A2 exams at the end of Year 13 complete the qualification.

For an international-school family the modular route is the usual one. It has a real advantage: a result banked at the end of Year 12 gives an early, evidence-based read on whether the subject and the grade target are realistic, before the final year.

Confirm with the school which board it uses and whether AS marks carry forward. It changes how the two years are paced and how early a problem subject shows up.

Subject choice

Three A-Levels is the standard load. Some students take four, usually where one subject is required for a specific course or the student is exceptionally strong. More than that is rarely worth the cost to the other grades.

The choice should be driven by destination, in this order:

• Degree prerequisites first. If a likely degree names a required subject, that subject has to be one of the three. Medicine expects Chemistry and usually Biology. Engineering and the physical sciences expect Mathematics, often Physics. Economics at quantitative universities increasingly expects Mathematics. A prerequisite missed at 16 can close a course that the rest of the profile would have won.
• Strength and engagement next. A-Levels are two years of hard, narrow work. A high grade in a relevant subject the student is good at is worth far more than a weak grade in one chosen because it sounds rigorous.
• A coherent combination. Selective universities read the set together. Three subjects that support a clear direction are stronger than three that point nowhere in particular.

Because A-Levels narrow early, the breadth the IB builds in has to be added deliberately here, through wider reading, an extended project, or enrichment, rather than through extra examined subjects. That is the honest defence of the A-Level model, and it depends on the school providing that enrichment.

How the A* to E grades work

A-Levels are graded A, A, B, C, D, E, with U for ungraded. A is the top grade and was added to separate the strongest candidates at the top of the old A grade.

Every grade from A* to E is a pass. There is no numeric scale here; the 9 to 1 reform applied to GCSE and IGCSE, not to A-Levels.

University offers are written directly in these grades. A typical competitive offer looks like AAA or AAB, and often names which subject the top grade must be in. The most selective courses ask for two or three A grades or better, frequently with a specified A in the prerequisite subject.

The point that follows for parents: the overall profile and the specific subject grade are separate conditions that both have to be met. Strong grades in the wrong subjects do not satisfy an offer that names a subject.

How universities use A-Levels

UK universities make conditional offers almost entirely on predicted and then final A-Level grades, plus any named subject. The predicted grades the school submits, and the credibility of that school's predictions, matter as much as the subjects.

US universities read A-Levels differently. They assess the whole transcript and weigh holistic factors, so the binary prerequisite logic is weaker, but strong A-Levels still count as clear evidence of academic rigour, and many institutions grant credit or advanced standing for high grades.

The wider point holds across systems. A-Levels and the IB Diploma are a choice of structure, early focus against sustained breadth, not a choice of seriousness. In a strong school both produce rigorous outcomes. In a weak one neither does. What the school does with the two years matters more than the label on the certificate.

The short version for parents

A-Levels are the post-16 qualification taken roughly 16 to 18, after the IGCSE or GCSE, as a separate graded qualification in each of a few subjects studied in depth. International schools usually run the modular International A-Level, AS in Year 12 then A2 in Year 13, with the Year 12 result banked; English-set A-Levels are now linear with AS decoupled, so confirm which the school uses. Take three subjects, chosen by degree prerequisites first, then genuine strength, then a combination that holds together; a fourth only with a clear reason. Grades run A* down to E, all passing, and university offers are written in those grades with named subjects that must be met alongside the overall result. Treat A-Levels as deliberate early focus, sound when the destination is clear and the school adds breadth around them, and weaker when it does not.