IB Physics Tutor

IB Diploma Physics is one of the three experimental sciences on the International Baccalaureate Diploma Programme, examined through two written papers worth 80% of the final grade and a Scientific investigation worth the remaining 20%, at both Standard Level (SL) and Higher Level (HL). The current syllabus, first taught from August/September 2023 and first examined in 2025, is organised into five themes: Space, time and motion; the particulate nature of matter; wave behaviour; fields; and nuclear and quantum physics.

The jump from GCSE or IGCSE Physics is not simply a matter of extra content. IB Physics expects students to reason from first principles in situations they have not met before, to justify conclusions with explicit reference to uncertainty, and to write about the process of doing science, not only its results. Command terms carry specific meaning in IB mark schemes, and an answer that is scientifically correct but does not match the command term asked for will not receive full credit.

What Makes IB Physics Different

A-Level Physics rewards students who can recall and apply well-rehearsed methods to familiar problem types. IB Physics does this too, but the syllabus's own assessment objectives go further: alongside demonstrating and applying knowledge, students must analyse, evaluate and synthesise experimental procedures and data, and carry out an investigation of their own design. Paper 1's data-based questions (1B) and Paper 2's extended-response items are where this shows up most clearly in the exam room, presenting experimental scenarios that may be unfamiliar and asking students to interpret graphs, evaluate methodology and apply physical reasoning without the scaffolding of a well-drilled question type.

The IB also integrates the Nature of Science throughout the course rather than teaching it as a separate module: physics is framed as a discipline with methods, limitations and evolving models, not only a body of facts to be learned. This shapes how exam questions are worded and what kind of answer earns full marks — a response that states a result where the question asks the student to derive it will not receive full credit, even where the underlying physics is correct.

For students who have studied, or are considering, A-Level Physics instead, the content overlap between the two qualifications is substantial — our A-Level Physics tuition page sets out the equivalent detail for that specification. What differs most is the assessment: IB Physics has no terminal paper testing content alone without an experimental or investigative angle, and the Internal Assessment has no direct A-Level equivalent at all.

How IB Physics Is Assessed: Paper 1, Paper 2 and the Internal Assessment

IB Physics, first examined in 2025, is externally assessed through two papers rather than three. Paper 1 combines multiple-choice questions (1A) with data-based questions (1B); Paper 2 is short-answer and extended-response only. Together the two papers make up 80% of the final grade — 36% for Paper 1 and 44% for Paper 2 — with the Scientific investigation (the Internal Assessment) worth the remaining 20% at both SL and HL. HL students sit longer versions of the same two papers rather than a separate third paper: the additional HL content is assessed inside Paper 1 and Paper 2, not in a paper of its own.

Command terms matter as much as content. ‘Outline’, ‘explain’, ‘deduce’ and ‘derive’ have specific meanings in IB mark schemes, and Paper 2's extended-response questions are marked against exactly what the command term asks for, not against whether the underlying physics is correct. The same two-paper structure and 20% Internal Assessment weighting apply across all three Diploma Programme sciences — see our IB Chemistry tuition page for the chemistry-specific breakdown.

Teaching Hours Across the Five Themes

The IB's own subject brief sets a recommended number of teaching hours for each of the five DP Physics themes, at SL and at HL, and the size of the gap between the two levels is not even across the syllabus.

Fields sees the largest jump: recommended hours double, from 19 at SL to 38 at HL — a 100% increase, and the largest proportional rise of the five themes. Three of Fields' four sub-topics (gravitational fields, electric and magnetic fields, and motion in electromagnetic fields) are taught to some depth at both levels; the fourth, induction — including Faraday's and Lenz's laws — is Higher Level only, which is a large part of why the theme's hours grow so much. By contrast, The particulate nature of matter grows by the smallest proportion of the five, from 24 hours at SL to 32 at HL, a rise of roughly a third (33%).

Higher Level vs Standard Level — What the Gap Actually Means

The distinction between HL and SL in Physics is not only a matter of extra topics. At HL, the mathematical demands increase substantially, and the expectation that physical intuition works alongside that mathematics becomes far more pronounced — consistent with HL's extra 70 recommended teaching hours across the syllabus (180 against 110 at SL).

HL students encounter wave phenomena including single-slit diffraction and resolution criteria, the full quantitative treatment of Faraday's and Lenz's laws in electromagnetic induction — a topic taught only at HL — and the complete treatment of gravitational, electric and magnetic fields, including field lines, potential and the relationship between field strength and potential gradient. Circular motion at HL requires students to resolve forces correctly in non-trivial geometries and apply Newton's second law in rotating frames without prompting.

What separates strong HL candidates from those who struggle is not usually whether they have covered the content. It is whether they can move fluidly between a physical situation and its mathematical representation — setting up an equation from a diagram, identifying which quantities are conserved, or recognising when an approximation is valid. This fluency takes time and deliberate practice to build, and it does not emerge from reading notes alone.

The Internal Assessment

The Internal Assessment in IB Physics is the Scientific investigation: an individual, open-ended experimental task worth 20% of the final grade at both SL and HL, examined through a written report capped at 3,000 words. Students design and carry out their own investigation, gather and analyse data to answer their own formulated research question, and write it up independently for moderation.

The most common failure when framing the research question is a question that is either too broad to control experimentally or too narrow to generate meaningful data. A strong IA question identifies a single independent variable, specifies the dependent variable clearly, and acknowledges the controlled variables that would otherwise introduce systematic error. Students who treat the IA as an opportunity to investigate something genuinely interesting to them — and who spend time refining their methodology before collecting data — consistently produce stronger work than those who rush to the practical stage.

One concrete piece of advice: before finalising a research question, sketch out the data table in full. If the units of every column and which variable goes on each axis of the graph are not yet clear, the question is not precise enough. This single check catches most of the methodological vagueness that costs marks when a report does not clearly justify its method and reasoning. Our IB Internal Assessment support covers the same word-count and assessment demands across every Diploma science.

Where Students Most Often Lose Marks

• Applying principles to unfamiliar scenarios: Students who have learned physics by pattern-matching question types struggle when Paper 1's data-based questions (1B) or Paper 2's extended-response items present a novel experimental context. The skill being tested is physical reasoning, not recall.
• Significant figures and uncertainty: IB examiners apply these conventions consistently. Answers given to the wrong number of significant figures, or uncertainties that are not propagated correctly through calculations, lose marks that students often assume they have secured.
• Command term precision: ‘Outline’, ‘explain’, ‘deduce’, and ‘derive’ have specific meanings in IB mark schemes. A response that describes when the question asks to explain, or that states a result when the question asks to derive it, will not receive full credit regardless of whether the physics is correct.
• IA Evaluation: Students frequently list sources of error without evaluating their significance or proposing realistic improvements. Strong reports show critical thinking about the investigation's limitations, not a catalogue of things that went wrong.

What to Expect From Tuition

Tuition with Leading Tuition is led by physicists with direct experience of the current IB Physics syllabus, first examined in 2025. Sessions are built around the specific demands of the course — not generic physics teaching — and are tailored to whether a student is at HL or SL, how far through the course they are, and where their particular gaps lie.

For students working on the IA, a tutor can help at the question design stage, during data analysis, and at the write-up stage — without compromising the independence the assessment requires. For exam preparation, sessions focus on developing the reasoning skills that Paper 1's data-based questions and Paper 2's extended-response items demand, alongside systematic work through the content areas where marks are most commonly dropped. If a child needs support across other IB Diploma subjects too, our full IB tuition range covers every subject and component.

For full curriculum information and assessment details, see the official IBO Physics subject page.

Leading Tuition is rated 4.8 out of 5 on Trustpilot from 59 reviews, read on 3 October 2026, and 91% of our students achieve their desired grades.

Reviewed September 2026: assessment weightings, paper structure and Internal Assessment word limit checked against the International Baccalaureate's Diploma Programme Subject Brief for Sciences: Physics (first assessment 2025).

Frequently Asked Questions about IB Physics