Criterion A: Framework for the essay
6 marksUse a clear question, suitable research methods and an effective essay structure.
IB Physics EE Grader
Grade your Physics EE before you submit. Upload your draft and get a mark for each criterion, comments tied to your sentences, and a list of what to fix first.
5 free gradings a month. No card. Private to you.
- of IA and TOK marks within one grade of the IB's final mark
- 92%
- marking score. ChatGPT 65, Claude 61, Gemini 57
- 74/100
- real IAs and TOK essays tested against the mark the IB gave
- 1,317
These results are for IAs and TOK. We haven't tested Extended Essays yet.
- Marks
- 30, from five criteria
- Length
- 4,000 words at most
- Reflection
- One RPF statement, up to 500 words
- Subject guidance
- Sciences
See the mark, and the sentences behind it
Test your research question, subject knowledge, line of argument, evaluation and reflection across the whole draft. See what is working and get a short list of what to change next.
What Marksy checks for each Physics EE criterion
You get a mark for each IB assessment criterion below. The points under each one are what Marksy looks for in your draft. See the mark bands
Criterion B: Knowledge and understanding
6 marksShow subject knowledge through relevant sources, concepts and accurate terminology.
Criterion C: Analysis and line of argument
6 marksAnalyse the research and connect the question, findings and conclusions.
Criterion D: Discussion and evaluation
8 marksWeigh the findings and assess the strengths and limits of the research.
Criterion E: Reflection
4 marks- This criterion uses the reflective statement on the RPF, rather than the essay itself.
Where Physics EEs usually lose marks
Marksy flags these in your draft and links each one to the sentences it is about.
- A setup that can't measure what the theory needsIf your equation links two speeds, you need to measure both at the same time, for the whole run. Plan how, with video or sensors, before you start.Criterion A
- One data set, one calculationWorking out a planet's mass from one moon is a sum, not an essay. Use several data sets, say why you chose each one, and compare the answers they give.Criterion A
- An equation quoted, not derivedStart from the principle, like conservation of energy or Kepler's third law, and derive the equation you test. Say what each assumption means for real data.Criterion B
- Data never tested against the modelFitting a curve isn't enough. Rearrange or take logs so your model becomes a straight line, then compare your gradient with the value the theory predicts.Criterion C
- Sections that drift off the questionA history of fluid dynamics or a page on uses of rockets adds words, not marks. Keep every section tied to the relationship you are testing.Criterion C
- Assumptions never checkedIf you ignored friction or air resistance, come back to it. Estimate how big the effect was and whether it explains the gap between your data and the theory.Criterion D
Before you upload
- Include the derivation of the equation you test, one step per line.
- Give the resolution of each instrument, or the source of each data set.
- Write gradients, intercepts and their uncertainties in the text or a table, not only on the graph.
Your draft stays at the centre
Marksy reads the work you upload, points each comment back to your writing, and puts the most important changes first.
Does each section help explain the physics behind the result more clearly?Read Physics EE Planning Guide
- 1
Upload your draft
A PDF of your Physics EE, finished or not. Every comment stays connected to your own writing.
- 2
Read the comments
Highlights show which passage each comment is about.
- 3
Fix the important parts first
Work down a short list instead of making scattered edits.
- 4
Keep the final say
Accept, adapt or ignore each suggestion. You stay the author.
What students wrote afterwards
From Trustpilot, as written.
marksyib has saved my ib diploma. thanks to it, my IA's were perfect and got the points i needed. really recommended.
Marksy ib allowed me to be able to finish my IAs much before allowing me to be able to relax better. 100% recommended
Your work stays your work
Marksy reads the draft you upload and comments on it. It doesn't rewrite your assessment, and your files are never used to train AI.
Read the safety answers- Private to youOnly you can see your work unless you choose to share it.
- Never used for trainingYour coursework is not added to any AI training data.
- Feedback, not ghostwritingUse the report to improve your own analysis and decisions.
- Delete it whenever you wantYou control the files stored in your account.
Questions before you upload
Still planning? The coursework guide covers the criteria and what to ask yourself while you write. Open the guide
Yes. Estimating Saturn's mass from data on its moons and rings is one example. Choose data sets you can compare, explain why you picked them, and do the analysis yourself.
You can, but the method has to be yours, not one the lab already uses. Say clearly which choices you made yourself.
It reads each step and flags jumps that aren't explained or don't follow. It can't run your experiment, so if it questions a result, check it against your raw data.
We tested Marksy on 1,317 real IAs and TOK essays with the mark the IB gave them. 92% of Marksy's marks landed within one grade. On a set with as many weak as strong essays, it scored 74/100 on our marking score, against 65 for ChatGPT, 61 for Claude and 57 for Gemini. We haven't tested Extended Essays yet, because the marked EEs we hold are almost all high-scoring. Every number is on the grading accuracy page.
Yes. Marksy checks your Physics Extended Essay EE against the IB assessment criteria for it and returns marks, comments and fixes instead of generic essay advice.
Yes. Early drafts are useful because the report can show a weak criterion before you spend hours polishing the wrong section. You can revise and grade another version later.
A free account includes 5 gradings a month. You don't need a card.
No. Marksy reads your existing work, explains each comment, and suggests what to revise. The writing and the final decisions stay yours.
Your upload is private to your account, is not used to train AI models, and can be deleted whenever you want.
Stop guessing what to fix in your Physics EE
Upload the version you have now and find the parts holding it back.