A badly written question measures carelessness or guessing instead of knowledge. A good question does not mislead people who do not know, does not punish people who do, and teaches something once it is answered. These tips apply to classroom quizzes and friendly competitions alike.
1. Let each question measure one idea
“Which planet is closest to the Sun, and how many moons does it have?” asks for two separate facts. If someone knows one and not the other, the answer is meaningless. If you want to measure two things, write two questions.
2. Make the stem understandable on its own
Someone reading the question should know what is being asked without looking at the options. Empty stems such as “Which of the following is true?” turn the question into a game of comparing options. Keep unnecessary information, double negatives and hints out of the stem.
3. Make distractors plausible
A distractor is a wrong answer that can look right to someone who does not know. Options everyone eliminates at first glance turn the question into a two-option one. Take distractors from mistakes people really make or from concepts that are often confused.
- Keep distractors of the same kind (all years, all cities, all formulas).
- Avoid “none of the above” and “all of the above”; they are easy guessing doors.
- A joke option can be fun, but one per quiz is plenty.
4. Do not make the correct answer longer or more detailed
Most people who do not know the answer pick the longest, most detailed option, because correct answers tend to be written with extra explanation. Bring the length and sentence shape of the options close together. Vary the position of the correct answer too: not always B, not always C.
5. Do not hide the answer inside the question
If a word in the stem gives the answer away, the question tests attention, not knowledge. The same rule holds when you add an image: if the photo plainly shows the answer, the question is already over.
6. Set the time for the job the question does
A few seconds are enough to recall a date; a calculation needs more. Think of the time as reading time plus thinking time. Too short measures speed, not knowledge; too long slows the game down and invites a search for the answer.
7. Spread the difficulty
Start with questions easy enough for everyone and let the difficulty rise. An all-easy quiz is boring, an all-hard one kills motivation. Two or three hard questions in a quiz are enough to separate the ranking.
8. Have someone else take it before you publish
The first person to solve it finds the ambiguities the author cannot see. If possible, have a friend or colleague take the quiz once; every question that is misread is a question to rewrite. The same applies to drafts created with AI.
Extra care with true/false questions
True/false questions are quick and fun, but the chance of guessing is fifty percent. So use them for pace and warm-up, not to measure knowledge on their own. Absolute words such as “always”, “never” and “only” tend to signal a false statement, while “usually” and “sometimes” tend to signal a true one. A student who spots the pattern gets it right without knowing the topic, so spread negative statements deliberately.
A good true/false question tests a common misconception: “The seasons are caused by the Earth moving closer to and farther from the Sun.” That statement is false, and it teaches once the answer is revealed.
Use image questions well
An image is valuable when it helps the question be understood and a distraction when it is decoration. If you ask for a location on a map, the map is genuinely needed; if you ask about a concept, an unrelated photo only takes time. Make sure the image does not give away the answer: a photo of a famous person under “Who is this?” is fun, but if the picture shows the name, the question is over.
Mind copyright. You can use the image sources in Quizera or upload your own photos; do not add someone else’s image to your quiz without permission.
Example: improving a weak question
Weak question: “Which of the following is true about photosynthesis?” Options: A) It happens in plants, B) It happens in animals, C) It uses oxygen, D) It speeds up in the dark. The stem is empty, the options mix unrelated ideas (where it happens, what it uses, when it speeds up), and only A sounds like a plain fact, so a student can pick it by common sense without knowing anything about photosynthesis.
Improved question: “Which gas do plants release into the atmosphere during photosynthesis?” Options: A) Oxygen, B) Carbon dioxide, C) Nitrogen, D) Hydrogen. The stem asks one idea, the options are gases of the same kind, and the correct answer is neither longer nor shorter than the rest. Whether the student knows the answer or not, it is clear why it is what it is.
In short
Writing good questions is not a skill you learn once but a habit that improves a little with every quiz. You can find the question types and timing settings on the Features page.
