Diagnostic assessment vs ordinary maths quizzes: what is the difference?
By the BrightHop team · Published · Updated
Short answer
An ordinary quiz measures how much a child gets right. A diagnostic check is designed to show which skill is missing, using questions whose wrong answers mean different things. Quizzes suit revision and fluency. A diagnostic check suits the moment you do not know why a child is stuck.
The differences at a glance
| Aspect | Ordinary quiz | Diagnostic check |
|---|---|---|
| Main aim | A score | The specific gap |
| Questions | Often repeats of one type | Different forms of the same skill |
| Wrong answers | All count the same | Each can point to a different cause |
| Result | A mark | A skill to teach next, and why |
| Best for | Revision, fluency, confidence | Working out why a child is stuck |
Example
Ten questions of the form 4 + 3 = ? will score 10 out of 10 for a child who cannot do 4 + ? = 7. A quiz of that kind says 'all good'. A diagnostic check mixes in the missing-number form and finds it.
When a quiz is the better tool
Once a skill is secure, repeated quizzing builds speed and keeps it fresh. Many children also enjoy the confidence of a high score. A diagnostic check does not replace that.
What a short check cannot do
- It cannot grade a child against a year level formally.
- A handful of questions can mislead if the child was tired or distracted, so repeat it before concluding.
- It does not replace a teacher's view or a formal assessment where one is needed.
Try it
Compare for yourself. The free addition Skill Check mixes three question forms in five questions.
Try the free addition Skill CheckFrequently asked questions
Are BrightHop Skill Checks quizzes or diagnostic checks?
They are short checks designed to show which sub-skill needs work, for example separating adding two groups from finding a missing number. They are informal, and not a formal assessment.
Related guides
Sources
- Inside the Black Box: Raising Standards Through Classroom Assessment (Black & Wiliam, Phi Delta Kappan, 1998)
This guide is written by the BrightHop team from BrightHop’s own teaching approach. It is not independent research and not official curriculum guidance. Curriculum and research statements link to their original sources above. Skill Checks are informal and do not replace a teacher’s advice. About BrightHop