For M28 students: IB exams in May 2028, started DP1 in August 2026.
Yes, it is possible to move up to IB Physics HL during DP1, particularly if you request the change early and have kept pace with SL content. Your school must approve the switch, however, and approval depends on its deadlines, timetable, class capacity, academic expectations, and subject-change policy.
Moving from SL to HL is generally easier in the first weeks or months of DP1. Before deciding, examine the additional syllabus content, your complete Diploma subject combination, and the independent catch-up work required.
When moving from Physics SL to HL is realistic
A switch is most realistic when you have secure foundations in algebra, graphs, units, vectors, and rearranging equations. You should also be comfortable applying concepts to unfamiliar problems rather than relying on memorized formulas.
Positive signs include:
- You understand the SL material completed so far and can solve standard questions independently.
- You are confident with algebra, trigonometry, proportional reasoning, and graphs.
- Physics HL fits your timetable without displacing a required subject.
- You can catch up while maintaining five other subjects and the DP core.
- Your teacher considers the move academically sensible.
- Physics HL supports a possible university course, such as physics or engineering.
A switch is less realistic if you are struggling with shared SL foundations or would need to neglect several other subjects. One low test score does not make HL unsuitable, but recurring difficulty with mechanics, units, graphs, or algebra should be addressed first.
Do not switch only because HL appears stronger on a university application. Check official entry requirements for courses and countries you may consider, since Physics HL is required or advantageous for some degrees but unnecessary for others.
What changes when you move up to IB Physics HL?
The current course is organized around five themes: space, time and motion; the particulate nature of matter; wave behaviour; fields; and nuclear and quantum physics. HL students study the SL foundations with considerably more depth and additional material.
The IB recommends 150 teaching hours for SL and 240 teaching hours for HL. This difference explains why a late SL to HL Physics change is difficult. It involves approximately 90 additional recommended teaching hours, not merely harder examination questions.
The complete HL-only topics
Under the course first assessed in 2025, five topics contain no SL content:
| Syllabus section | HL-only topic | Main ideas involved |
|---|---|---|
| A.4 | Rigid body mechanics | Torque, rotational equilibrium and rotational dynamics |
| A.5 | Galilean and special relativity | Reference frames, time dilation and length contraction |
| B.4 | Thermodynamics | Entropy, processes and thermodynamic laws |
| D.4 | Induction | Magnetic flux and induced electromotive force |
| E.2 | Quantum physics | Matter waves, quantum behaviour and microscopic models |
These are not the only differences. Topics shared by SL and HL also contain additional higher level content, so completing these five topics does not mean you have caught up fully. Ask for your school's syllabus checklist and identify every HL understanding already taught.
The Physics SL versus HL syllabus explanation offers a practical comparison. The IB Physics resource hub can then help you locate notes and questions for specific gaps.
Check your Diploma subject combination
Changing one course level affects your complete Diploma programme. Diploma students take six subjects and must normally cover Groups 1-5: studies in language and literature, language acquisition, individuals and societies, sciences, and mathematics. The sixth course is usually an arts subject or another permitted subject from Groups 1-5.
Students take at least three HL subjects and no more than four, with the remaining courses at SL. Environmental systems and societies (ESS) is interdisciplinary and can meet both Group 3 and Group 4 requirements, although your coordinator must confirm that your combination is valid.
If Physics becomes your fourth HL, the combination may be permitted, but your school could discourage the workload or ask you to lower another subject. If you already have four HLs, Physics cannot become a fifth within the standard Diploma framework.
School approval, timetables, deadlines, and fees
The IB establishes the Diploma framework, but your school approves subject and level changes. Schools set their own internal deadlines and procedures, so there is no universal date by which every M28 student must switch.
Ask your DP coordinator to confirm:
- The final school deadline
- Whether the HL class has space
- Whether SL and HL use different timetable blocks
- Whether another subject must move to SL
- Which HL content and practical work has been completed
- Whether a teacher recommendation, assessment, or trial is required
- Whether class changes, materials, registration, or online provision create fees
Timetabling can prevent an academically appropriate switch. Physics HL may run alongside a language or another required subject, and a school cannot always rebuild its timetable for one student. Obtain written confirmation before dropping lessons or assuming that your registration has changed.
A practical Physics HL catch-up plan
Begin by requesting a precise list of content, practical work, and assignments completed by the HL class. Your first objective is to join current lessons without leaving foundational gaps, not to study the entire HL syllabus immediately.
Week 1: Diagnose the gap
Compare your SL work with the HL class record. Mark each missed section as secure, partly understood, or not studied, then answer a short question set to test your judgment.
Review the IB Physics Study Notes for shared foundations first. For mechanics gaps, the forces and momentum resources can support prerequisite review before you attempt HL questions.
Weeks 2-3: Learn missed material
Schedule three or four focused sessions each week. Each session should include concept review, worked examples completed actively, independent questions, and error correction.
Keep an error record containing the concept, your mistake, the correct reasoning, and a review date. This is more effective than repeatedly rereading explanations without correcting the reasoning behind errors.
Week 4: Test readiness
Complete a timed mixed set and ask the HL teacher to examine your working. Check diagrams, units, significant figures, explanations, and selection of physical principles, not only final answers.
Use the course equations and constants consistently. RevisionDojo's Physics data booklet guide can help you practise locating and interpreting relationships instead of trying to memorize every equation.
After entering the HL class, retain one weekly consolidation session until your teacher confirms that the gap is closed. Use resources such as Quantum Physics HL only when that topic is part of your identified gap or current class sequence.
Common mistakes when switching to Physics HL
The central misconception is that HL is the same course with a few harder questions. It includes additional concepts, deeper treatment, and a substantially larger recommended teaching allocation.
Avoid switching because friends take HL, ignoring your other subjects, waiting until the deadline to investigate missed work, or reading notes without solving questions. Do not use a syllabus from before first assessment 2025, and never assume verbal approval means your timetable and registration have been updated.
Conclusion
You can move up to IB Physics HL in DP1 if your foundations, timetable, workload, and Diploma combination support the change. Confirm the deadline, conditions, missed content, and any fees with your DP coordinator before committing. If the switch is approved, RevisionDojo's Study Notes and topic questions can support a structured catch-up plan without replacing guidance from your Physics teacher.
Sources and referenced URLs
- IB Diploma Programme curriculum and HL requirements
- Official IB Physics curriculum page
- Official IB sciences curriculum
- Official IB Environmental Systems and Societies page
- RevisionDojo IB Physics resources
- RevisionDojo Physics SL versus HL explanation
- RevisionDojo Physics Study Notes
- RevisionDojo Physics data booklet guide
- RevisionDojo forces and momentum resources
- RevisionDojo Quantum Physics HL resources