Criterion A: Framework for the essay
6 marksUse a clear question, suitable research methods and an effective essay structure.
IB Computer Science EE Grader
Grade your Computer Science 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 Computer Science 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 Computer Science EEs usually lose marks
Marksy flags these in your draft and links each one to the sentences it is about.
- A product, not a questionBuilding an app and writing up how it went isn't an investigation. A CS EE asks a question, such as how core type affects run time, and answers it with an experiment.Criterion A
- Timings you can't trustOne run on a laptop with other apps open says little. Repeat each run, keep the hardware and software fixed, use large inputs, and report all of it.Criterion A
- Two models, two different testsIf a neural network and k-nearest neighbour don't get the same data, the same train and test split and fair tuning, the comparison can't answer your question.Criterion A
- No theory before the testExplain how each algorithm or hardware feature works, and its time complexity, before you benchmark it. Then use that theory to explain your results.Criterion B
- Accuracy as the only numberOn medical data, a model can score high accuracy while missing most rare cases. Pick measures that fit your question, like precision or recall, and say why.Criterion C
- Results that only hold on your machineSay how far your findings carry over to other CPUs, datasets or languages, and what you would test next to find out.Criterion D
Before you upload
- List your hardware, operating system, language and library versions.
- Name your dataset, where you got it and any changes you made to it.
- Show results in tables with units and the number of runs behind each value.
- Keep code excerpts short and only where they explain a choice. Describe what they do in words.
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 build a technical argument instead of just describing technology?Read Computer Science EE Planning Guide
- 1
Upload your draft
A PDF of your Computer Science 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
No. The CS IA is a product you build and document. The EE is an essay of up to 4,000 words that investigates a research question with data.
Yes. It uses the EE criteria with the sciences guidance, like Biology and Physics. So you need a question you can test, a method someone could repeat, and data you analyse yourself.
Only if the app is a tool for answering a question. The marks go to your question, method, analysis and evaluation, not to how much you built.
No. It reads your essay and the code excerpts in it. It can tell you if your test looks unfair or your conclusion goes past your results, but it can't run your programs or check your timings.
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 Computer Science 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 Computer Science EE
Upload the version you have now and find the parts holding it back.