---
title: "IB Higher Level vs Standard Level: How Parents Can Choose"
description: "How IB HL and SL differ, what universities expect, how many HL subjects to take, and how parents can help a student choose and cope."
url: https://bosenacademics.com/blog/ib-hl-vs-sl-parent-guide/
published: 2026-06-27T01:41:18Z
updated: 2026-11-12T17:05:00Z
section: "For parents"
publisher: Bosen Academics (https://bosenacademics.com)
---

# IB Higher Level vs Standard Level: How Parents Can Choose

**The short answer:** Three well-chosen HL subjects are enough for most competitive university programs, and HL needs about 240 teaching hours against 150 for SL. Start from the target programs' published HL requirements, put the remaining HL slot on a real strength, and avoid a fourth HL unless specific programs call for it.

Choosing which subjects to take at Higher Level (HL) and which at Standard Level (SL) is one of the first big decisions a student makes in the IB Diploma Programme. For families meeting it for the first time, the difference can seem murky and the stakes high. Which HL courses will universities really ask for? Is four HL subjects worth it? What if your child picks the wrong level going into Grade 11?

This guide explains what HL and SL mean, how universities read these choices, and how to decide in a way that fits your child's strengths and university goals.

## What Separates IB HL from SL?

HL and SL courses are drawn from the same six subject groups, but they differ a great deal in depth and workload. **HL courses need roughly 240 teaching hours over two years, compared with 150 hours for SL.** HL content goes further, its assessments are tougher, and the internal assessment components differ too.

A quick side-by-side comparison:

| Feature | Higher Level (HL) | Standard Level (SL) |
|---|---|---|
| Teaching hours | ~240 over 2 years | ~150 over 2 years |
| Score range | 1 to 7 | 1 to 7 |
| Depth of content | Extended, more complex | Core curriculum only |
| University weighting | Often named in requirements | Counts toward overall score |
| Typical weekly workload | Significantly heavier | Moderate |

Most Diploma students take three HL subjects and three SL subjects, six in all. The IB allows up to four HL subjects, which we look at below.

## How Many HL Subjects Do Competitive Universities Expect?

Three HL subjects is the IB minimum, and for most university programs, three well-chosen ones are enough. **Competitive programs do not usually require a fourth HL, but they do name minimum scores in particular HL subjects.** This is the detail families most often miss when planning the IB course load.

Some typical university HL expectations, from our experience with students applying to top programs:

- **Engineering at Waterloo:** Mathematics: Analysis and Approaches (HL recommended), plus Physics, Chemistry and English A, with at least a 4 in each course and a total of 31 (excluding Diploma points).
- **Science at McGill:** Mathematics and two of Biology, Chemistry or Physics, with at least one math or science at HL and grades of 5 or better for most programs.
- **Management at McGill:** HL Mathematics (AA or AI), or SL Mathematics AA with a predicted or final 6 or 7.
- **Oxbridge (Oxford and Cambridge):** Frequently a 7 or close to it in the HL subject most relevant to the intended course. Offers are often tied to specific scores and are binding.
- **Ivy League and selective US liberal arts colleges:** No uniform HL rules, but a strong HL profile in relevant subjects considerably strengthens an application.

Always confirm requirements on the university's own admissions page, because IB entry requirements can change from year to year.

## Which Subjects Should Be HL and Which SL?

The right HL line-up rests on three things: the programs your child hopes to enter, their natural strengths, and the HL requirements of those specific universities. **A deliberately chosen HL profile raises the odds of meeting the conditions of an offer at top schools.**

A practical way to decide:

1. **Start with the target programs.** Find each school's published IB requirements. Waterloo Engineering, U of T and McGill all post specific IB subject requirements online.
2. **Take HL in the subjects those programs require or strongly prefer.** If the program is the goal, these choices are not optional.
3. **Use the last HL slot with intent.** A student aiming for business might pair HL Math with HL History or HL English, which shows breadth and can strengthen a liberal arts or business application.
4. **Choose SL where HL adds little.** A commerce applicant does not need HL Chemistry. Taking it at SL meets the group requirement without extra workload.

From our work with IB students at schools including Upper Canada College, Havergal College, Branksome Hall and Crescent School, the most common family mistake is picking HL subjects because they sound impressive, not because they fit the student's strengths and the real requirements of the target programs. An HL course that ends in a 4 or 5 when the program wants a 6 does more harm than a well-chosen SL course at the same school.

You can see the subjects and levels our tutors cover on our [tutoring page](https://bosenacademics.com/tutoring/).

## Is a Fourth HL Subject Worth It?

For most students, no. **Students who take four HL subjects without enough academic support often see their total diploma score drop, which can hurt admissions more than the extra HL helps.**

The students who actually gain from four HL subjects tend to be those who:

- Apply to programs with conflicting HL requirements, such as keeping both a life science program and engineering open
- Showed exceptional ability in Grade 10 in all four subject areas, backed by strong teacher endorsements
- Will have steady academic support through both years of the Diploma

A student who earns 38 points with three well-chosen HL subjects will usually be more competitive than one who earns 34 points across four. Experienced IB teachers keep stressing depth over breadth when it comes to HL selection.

## How Can Parents Support HL Coursework?

HL coursework is truly demanding. According to experienced IB teachers, HL Mathematics AA and HL Physics rank among the toughest courses in any high school curriculum worldwide. Support helps most when it begins early in Grade 11, before Internal Assessment deadlines and the growing workload make catching up hard.

Practical steps for parents:

- **Set up a sustainable weekly study routine early in Grade 11,** before Internal Assessment work gets going in earnest.
- **Line up subject-specific help in the HL subjects where the step up from Grade 10 is steepest,** especially Mathematics, the Sciences and Economics.
- **Keep track of Internal Assessment deadlines.** Schools set them, often in the fall or winter of Grade 12, and the IA makes up roughly 20 to 30 percent of the final subject score in most subjects.
- **Go over predicted grades with your child's teachers** by the end of Grade 11, and act early if predictions fall short of the target programs' minimums.

If you are planning your child's IB course load, or they are already in the Diploma and struggling with an HL subject, [book a free consultation with Bosen Academics](https://bosenacademics.com/consultation/) to connect with an educator who knows the IB curriculum well.

## Final Thoughts

Deciding between HL and SL is one of the most consequential academic choices before Grade 11. The right mix balances university requirements, real subject strength and an honest view of a two-year workload. For most students aiming at competitive programs, three carefully chosen HL subjects beat four taken under strain with lower scores across the board.

Bosen Academics offers IB tutoring in person and online from North York, Toronto. For help with course selection or one-on-one support in any HL subject, [reach out through our consultation page](https://bosenacademics.com/consultation/).

## Frequently asked questions

### How many HL subjects does the IB Diploma require?

The IB Diploma normally has three HL subjects and allows no more than four. Most students take exactly three. A fourth HL is optional and makes sense only when particular university programs need subjects that would otherwise push the student past three.

### Do universities say which subjects must be at HL?

Yes. Many competitive Canadian, American and UK programs name required HL subjects and minimum scores, not just a total diploma score. Engineering and science programs often ask for HL Mathematics and at least one HL Science. Check each program's admissions page.

### Can a student move from HL to SL after starting the Diploma?

It is sometimes possible, but each school sets its own deadline, and most close the window early in the first year of the Diploma. Ask your school's IB coordinator for the dates. After that, switching is generally not allowed, and late changes can affect predicted grades and teacher relationships.

### What HL score do Canadian universities look for?

Published minimums are often lower than families expect, and competitive offers can sit higher. Waterloo Engineering lists a minimum of 4 in each course with a total of 31 (excluding Diploma points), Waterloo's Mathematics programs ask for at least a 6 in HL Analysis and Approaches, and McGill expects grades of 5 or better in each subject for most programs. Oxbridge offers can name a 7 in a specific HL subject.

### Should my child take HL in an easy subject or a hard one?

Ideally both. One or two HL choices should match program requirements however hard they are. The last HL slot should go to a subject where the student is strong and likely to score 6 or 7, since a high HL result in a demanding subject shows real ability to admissions committees.

## Tutoring from Bosen Academics

One-on-one tutoring from certified teachers and subject experts with master's and PhD degrees, in person in North York, Toronto, or online. Book a free consultation: https://bosenacademics.com/consultation/