Formative vs. summative assessment: the difference, with examples
Formative assessment happens during learning and shapes what you teach next. Summative assessment happens at the end of a unit or course and measures what students learned, usually for a grade. The same quiz can be either one: it depends on what you do with the results.
Updated October 2026
Formative vs. summative assessment at a glance
| Formative | Summative | |
|---|---|---|
| Purpose | Improve learning while it is happening | Measure what was learned |
| When | During a lesson or unit | At the end of a unit, term or course |
| Stakes | Low: usually ungraded | High: counts toward a grade or a decision |
| Feedback | Fast and specific: what to do next | Often a score, after the learning is over |
| Who acts on it | The teacher adjusts teaching; the student adjusts learning | Grades, report cards, placement, program decisions |
| Examples | Exit tickets, hinge questions, feedback on drafts, practice quizzes | Unit tests, final exams, end-of-term projects, state tests |
In short: formative assessment is for learning, summative assessment is of learning. For the full picture of the formative side, see what formative assessment is and how to use it.
What is summative assessment?
Summative assessment sums up learning at the end of a period: a unit test, a final exam, a capstone project, a standardized state test. It usually carries a grade or a decision, so it needs to be fair, consistent and comparable across students.
Its weakness is timing. By the time the results come back, the class has moved on, and the student who failed the fractions test is already in the decimals unit. That is the gap formative assessment closes.
Examples side by side
Math: a fractions unit
- Formative: a hinge question mid-lesson ("Which is bigger, 2/3 or 3/5?"), answered by the whole class on mini whiteboards; an exit ticket asking students to add 1/2 + 1/3 and explain their first step.
- Summative: the end-of-unit test on comparing and adding fractions, graded.
English: an argumentative essay
- Formative: feedback on the thesis statement and outline before the draft; students checking their draft against the rubric.
- Summative: the final essay, graded with that same rubric.
Science: a lab investigation
- Formative: checking each group's hypothesis and variables before they run the experiment.
- Summative: the graded lab report at the end.
One test, used both ways
The label belongs to the use, not the task. A unit test is summative when it ends the unit. The moment you look at which questions most of the class missed and reteach those ideas, you are using it formatively.
Many schools also run interim or benchmark assessments a few times a year. They sit in between: big enough to compare progress across classes, early enough to change course before the end of the year.
Strengths and limits of each
Formative assessment
- Strength: catches misunderstandings while they are small and there is still time to act.
- Strength: students see where they stand without the pressure of a grade, so they show you what they really think.
- Limit: it only works if someone reads the answers and acts on them, every day. That is the part that gets dropped.
Summative assessment
- Strength: gives a fair, comparable measure of what each student can do at the end, which grades and reports need.
- Strength: motivates review and pulls a unit together.
- Limit: it arrives too late to change that unit, and a single score says little about what to do next.
And diagnostic assessment?
Diagnostic assessment comes before teaching: a pre-test or a quick prompt that shows what students already know and what they get wrong going in. It tells you where to start; formative assessment tells you how the journey is going; summative assessment tells you where it ended.
How they work together
- Formative in the middle, summative at the end. Done well, formative checks make the summative result unsurprising: you already know who is ready.
- Don't grade every check. When everything counts, students stop showing you what they don't know.
- Use the same criteria for both. If the final essay is graded with a rubric, give feedback on drafts with that rubric too.
Know what to reteach before the unit test does
Mentora grades written answers against your criteria as students turn them in, then writes a debrief: what the class understood, which wrong answers came up, who needs help, and what to do in the next class. Formative assessment, without the stack of answers to read.
Frequently asked questions
Is a quiz formative or summative?
Either. A quiz that counts toward the grade and is never revisited is summative. A quiz you read the same day and use to decide what to reteach is formative, even if it looks identical.
Is homework formative or summative?
Usually formative: it is practice, and its most useful job is showing you and the student what still needs work. It becomes summative when it is graded as a measure of mastery.
Can summative assessment be used formatively?
Yes. If you look at which questions most students missed on a unit test and reteach those ideas before the next unit, you are using a summative test formatively.
What is diagnostic assessment?
A check before teaching starts, such as a pre-test, to see what students already know. It is the third common type, alongside formative (during) and summative (after).
Which is more important, formative or summative assessment?
They do different jobs. Summative assessment tells you where students ended up; formative assessment is how you change where they end up, while there is still time.
Free tools
- Free exit ticket templates: 3-2-1, rate your understanding, muddiest point and more, printable or ready for Google Docs.
- Free easy grader: the percentage and letter grade for every possible number wrong, printable.
- Free AI essay grader: grade one written answer against your own criteria, in seconds.