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Practice Quiz With Answer Key and Explanations

Create a practice quiz at the right difficulty, with plausible wrong answers and explanations that teach, not just grade.

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Fill in each variable and watch the prompt update. Anything still in {{braces}} needs your input before you use it.

Fill in the blanks

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The broader subject.

Specific topic to quiz on.

Who's taking the quiz.

How many questions.

Formats to include.

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You are an experienced {{subject}} teacher writing a practice quiz.

Topic: {{topic}}
Learner level: {{learner_level}}
Number of questions: {{question_count}}
Question types: {{question_types}}

Requirements:
- Cover different parts of the topic; don't test the same fact twice.
- Mix difficulty: roughly one-third easy recall, one-third understanding, one-third application.
- For multiple choice: 4 options, one correct, and wrong options that reflect common student mistakes (not obviously silly).
- Don't reveal answers in the questions section.

Format:
**Questions** — numbered.
**Answer key** — for each question: the correct answer, a one-sentence explanation, and for multiple choice, the misconception behind the most tempting wrong answer.

Double-check every answer for correctness before finalizing.
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Example

Example input

Filled prompt
You are an experienced math teacher writing a practice quiz.

Topic: percentages (percent of a number, percent increase/decrease)
Learner level: 7th grade
Number of questions: 4
Question types: 3 multiple choice and 1 short word problem

Requirements:
- Cover different parts of the topic; don't test the same fact twice.
- Mix difficulty: roughly one-third easy recall, one-third understanding, one-third application.
- For multiple choice: 4 options, one correct, and wrong options that reflect common student mistakes (not obviously silly).
- Don't reveal answers in the questions section.

Format:
**Questions** — numbered.
**Answer key** — for each question: the correct answer, a one-sentence explanation, and for multiple choice, the misconception behind the most tempting wrong answer.

Double-check every answer for correctness before finalizing.

Example output

Illustrative example response — written by Promptly, not generated live

Questions

  1. What is 25% of 80? A) 20 B) 25 C) 32 D) 55
  2. A $40 shirt is on sale for 10% off. What is the sale price? A) $4 B) $30 C) $36 D) $44
  3. A plant grows from 20 cm to 25 cm. What is the percent increase? A) 5% B) 20% C) 25% D) 125%
  4. Short answer: A game costs $60. Its price rises by 10%, then the new price drops by 10%. What is the final price, and why isn't it $60?

Answer key

  1. A) 20. 25% is one quarter, and 80 ÷ 4 = 20. Tempting wrong answer B: confusing the percent with the result.
  2. C) $36. 10% of $40 is $4; $40 − $4 = $36. Tempting wrong answer A: giving the discount instead of the sale price.
  3. C) 25%. The increase is 5 cm, and 5 ÷ 20 = 0.25. Tempting wrong answer B: dividing by the new value (5 ÷ 25) instead of the original.
  4. $59.40. $60 + 10% = $66; then 10% of $66 is $6.60, so $66 − $6.60 = $59.40. The second 10% is taken from a larger number, so the changes don't cancel out.

Why it works

  • Learner level and a difficulty mix keep the quiz from being too easy or too hard.
  • Distractors based on common mistakes make multiple-choice questions diagnose real misunderstandings, and the answer key explains the misconception — so a wrong answer becomes a lesson.
  • The "double-check every answer" instruction helps, but AI can still make arithmetic or factual slips, so review the key before using it with students.

Techniques used