IB essay grader

AI feedback on your Extended Essay, IA or TOK work in a minute or two, against the published criteria, with an estimated mark.

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Our server sends your text to Anthropic, which marks it. IBLens never saves the text itself, and Anthropic deletes it within 30 days unless it is flagged under its usage policy or the law requires otherwise. The report is saved and can quote short passages: without an account it is deleted after 90 days unless you buy it, and in an account it stays until you delete it. Privacy

IBLens is independent of the International Baccalaureate and not endorsed by it. Every mark is an AI estimate, not an IB mark. Using AI feedback within IB rules

What a full report looks like

An example: a Business Management IA, with made-up marks.

16/25estimated markrange 13-18

Overall comment

Your IA demonstrates solid understanding of business concepts, and the supporting documents are well chosen, but their data is used only superficially. The main areas for improvement are the depth of analysis in Criterion D and the connection between your research question and conclusions.

Criteria breakdown

  • Integration of a key concept3/5
  • Supporting documents3/4
  • Selection and application of tools and theories3/4
  • Analysis and evaluation2/5
  • Conclusions2/3
  • Structure2/2
  • Presentation1/2

What is losing marks

  • Thin use of the documents. Criterion D needs the data in your supporting documents used to analyse and evaluate the research question.
  • Conclusion gap. Your conclusions don't fully answer the research question.

Where marks are recoverable

  • Use the documents in Criterion D. Bring figures from your supporting documents into the evaluation of each option.
  • Answer the question. Answer your research question explicitly in the conclusion.

What to fix first

  1. Use the figures in two of your supporting documents to weigh each option in Criterion D.
  2. End with a direct answer to the research question, drawn from that analysis.
  3. Label every table and chart with its source and what it shows.

Your free preview is the first half of this report: the range your total falls in, the overall comment and the first half of the criteria in full. The rest is blurred until it is opened.

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