How to Check an AI-Generated Quiz Before You Assign It

An AI quiz generator turns a reading into ten questions in about thirty seconds. The part that still takes judgment is the ten minutes after: deciding whether those questions are fit to put in front of a class, especially if the quiz counts toward a grade. This guide covers the six things that actually go wrong with AI-written multiple-choice questions, how to spot each one quickly, and what we found when we tested our own generator for them.

Disclosure: QuizForge is our product. The numbers below come from our own tests. The samples are small and we state their sizes, so read them as evidence of what to look for, not as general benchmarks.

The short version

• ✦Is the marked answer right? Read the explanation and find it in your material.
• ✦Could two options be right? Cover the marked answer and see whether another option can be defended.
• ✦Can it be answered from your material? Point to the paragraph each question comes from.
• ✦Does it cover the whole document? Compare the questions with the section headings.
• ✦Does it test understanding or just recall? Read the question verbs.
• ✦Are the distractors doing their job? Try to guess the answer from the options alone.

1. Is the marked answer actually right?

A wrong answer key is the most expensive failure. Students who answered correctly are marked wrong, and the explanation then teaches the wrong thing with confidence.

It is also rarer than you might expect when the generator writes from text you gave it. We generated 48 questions from four texts, two in English and two in Danish, and none of the 48 had a wrong key. Rare is not never, though, and one wrong key in a graded quiz costs more trust than the whole quiz saved in time.

How to check: read the explanation, not just the answer. A good explanation points at something specific in your material. If it is generic, or you cannot find where your material says it, look closer.

What QuizForge does: a separate verification model checks each answer key against your material before you see the quiz, and drops any question the source contradicts. To test the check, we moved the key in each of those 48 questions to a wrong option on purpose. It flagged all 48, and the genuine keys scored close to zero. If the check cannot run, for example when the verification service times out, the question is kept unchecked rather than holding up your quiz. That is one more reason the review step still matters.

2. Could two options be right?

The second failure is ambiguity: a distractor that is a paraphrase of the right answer, or one that is partly true. Students who understand the material pick it, get marked wrong, and are right to argue. The classic item-writing guidance is plain about this: every question needs one clearly best answer, and distractors should be plausible but wrong (Haladyna, Downing and Rodriguez, 2002).

How to check: cover the marked answer and ask whether any remaining option could be defended from your material. If you hesitate, students will too.

What QuizForge does: each non-marked option is checked on its own for whether it is also correct, and a question with a second likely-correct option is dropped. We tested this by planting a paraphrase of the right answer as a distractor in 36 questions. Checking each option separately caught 35 of the 36, with no false alarms on the 36 unmodified questions. Checking all four options in a single request caught only 29, which is why the check runs per option.

3. Can it be answered from your material?

Some questions reach beyond the text. That is not always wrong: an application question may deliberately ask students to use a concept in a new situation. But if the quiz is graded on an assigned reading, a question that needs outside knowledge is unfair.

In our test, 5 of the 24 English questions leaned on knowledge the source did not contain. Most were case-style questions; one depended on a payoff table that had been lost when the PDF was converted to text. That second cause is worth remembering: tables, figures and formulas are the parts of a document most likely to be lost in text extraction, so questions that mention them deserve a second look.

How to check: for each question, point to the paragraph it came from. If you cannot, decide whether it is a fair stretch question or should be cut for a graded quiz.

What QuizForge does: it records which questions the source does not cover, but does not show that yet, so this check is yours for now.

4. Does it cover the whole document?

Many generators read only the beginning of a long file. Wayground (formerly Quizizz) says in its help center that its AI processes the first 16,000 characters of an upload. Ours did the same until September 2026, reading the first 15,000 characters, and we measured what that does.

We generated 12-question quizzes from three long Wikipedia articles and counted how many questions came from beyond the first fifth of the article:

With the first-pages approach, two of the three quizzes never left the introduction.

How to check: put the question list next to the document's section headings. If the later sections have no questions, the generator probably read only the start. Split the document into sections and quiz each one, or narrow the quiz with a topic focus.

What QuizForge does: for a long document it now judges which passages are central to the subject and spreads its selection over the whole file, or over the passages relevant to your topic focus if you set one.

5. Does it test understanding, or just recall?

Read the verbs. "Which year", "what is the term for" and "which of the following is defined as" are recall. "Why", "what would happen if" and "which explanation best accounts for" ask for understanding. A good quiz usually has both, and a quiz meant to prepare for an exam should match the exam's balance.

In the coverage tests above, questions averaged about 1 on a 0 to 3 scale running from pure recall to application, whichever passages the generator read. Depth comes from what you ask for, not from which pages are read.

How to check: count the recall questions. If they are most of the quiz and you wanted more, regenerate rather than rewrite.

What QuizForge does: you can ask for depth directly: choose the case-based question style for scenario questions, or advanced difficulty.

6. Are the distractors doing their job?

A distractor that nobody would choose turns a four-option question into a two-option guess. The item-writing guidelines are practical here: keep options similar in length and grammar, make every distractor plausible, and avoid "all of the above" and "none of the above". The most common tell is the correct answer being noticeably longer or more carefully qualified than the others.

How to check: cover the question and read only the options. If you can pick the answer without the question, so can your students.

What QuizForge does: it shuffles the order of the options, so the correct answer does not sit predictably in one position, and every question can be edited before you assign it.

A 10-minute review routine

• ✦One minute: skim the question stems against the document's headings to check coverage.
• ✦Five minutes: for each question, read the explanation and find it in your material.
• ✦Three minutes: cover each marked answer and check whether another option could be defended.
• ✦One minute: edit or delete what failed, then assign.

After the class has taken the quiz, look at the questions most students missed. A question almost everyone gets wrong is either genuinely hard or broken, and it is worth reading once more before the grade stands.

What we automate, and what stays with you

A quiz is only as good as its worst question. The checks catch most of the failures that matter, and the ten minutes catch the rest. If you want to try this on one of your own readings, QuizForge's free plan gives you 2 quizzes a month with no credit card; there is more on classes and grading on the teachers page.

Source

Haladyna, T. M., Downing, S. M., and Rodriguez, M. C. (2002). A review of multiple-choice item-writing guidelines for classroom assessment. Applied Measurement in Education, 15(3), 309–333.

*Our test figures come from internal experiments run in September 2026: 48 generated questions from four texts for the answer-key check, 36 modified questions for the two-right-answers check, and three Wikipedia articles for coverage.*