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Read your Moodle quiz facility index to spot questions to rewrite

Upload your PDFs, slides or notes and get multiple-choice, true/false or open questions with explanations. Pro users can export them to Moodle XML, then check how each question performed.

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How the facility index helps you improve a quiz

Moodle quiz facility index measures how easy a question was for your class, based on the average mark students earned on it. A question scored by nearly everyone is probably too easy to separate strong and weak learners, while one that few students answered may have unclear wording or a wrong answer key.

Values near 1 mean most students got the question right, so it may be too easy.
Values near 0 mean few students succeeded, which can signal unclear wording or a wrong answer key.
Check the discrimination index alongside facility to see whether stronger students did better.
Review flagged questions before the next quiz, then rewrite or replace them.

Example Moodle quiz facility index questions

A question has a facility index of 0.92. What does that suggest?Most students answered it correctly, so it may be too easy to separate strong and weak learners.

A question has a facility index of 0.15. What should you check first?Check the wording and the answer key, since few students succeeded and the item may be unclear or mis-keyed.

Does a higher facility index mean a question is better?No. Facility only shows how many students answered correctly, while the discrimination index shows whether stronger students did better than weaker ones.

Where do you find the facility index in Moodle?It appears in the quiz statistics report under question statistics, where each question's performance is listed.

Why review the facility index after a quiz rather than before?Moodle calculates it from real student attempts, so the value only exists once students have taken the quiz.

Generate the full set

Questions from your own material

Upload PDFs, DOCX, PPTX, plain-text notes or photos of pages, and get questions drawn from what you actually teach.

Explanations for every answer

Each question includes an explanation, so students learn why the correct option is right after they answer.

Moodle XML export on Pro

The Pro plan exports your questions as Moodle XML and QTI 2.1 for import into your course quizzes.

How it works

Upload your notes or slides

Add a PDF, DOCX, PPTX, text file or photos of pages as your study source.

Review and edit the questions

Check each question and explanation, and adjust wording before you use the quiz with students.

Import and check the results

After students attempt the quiz in Moodle, read the facility index in the statistics report and revise weak items.

DeckOwl builds the questions and explanations from your own material, and the Pro plan exports them as Moodle XML for import. Moodle calculates the facility index only after students attempt the quiz, so the report tells you which generated questions to revise before the next round.

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Frequently asked questions

What is a good facility index for a Moodle quiz question?

There is no single correct target, because it depends on the purpose of the quiz and the group taking it. Use it to find questions that nearly everyone missed or everyone answered, then review those items.

How should I study a question with a very low facility index?

Go back to the source material and check whether the question matches what was taught. Then look at the wrong options students chose to find the misconception behind them.

Can I export DeckOwl questions to Moodle XML?

Yes, Moodle XML export is available on the Pro plan at $14.99 per month. The free plan lets you study in the browser but does not include exports.

Does DeckOwl calculate the facility index?

No, Moodle computes the facility index from student attempts in your course. DeckOwl generates the questions and explanations that you can import and review.

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