In simple terms
Formative assessment is checking what students have understood while the teaching is still going on, so the answer can change what happens next. A question to the class, a show of hands, a draft returned with comments: the format matters far less than the timing.
The defining test is use. Evidence counts as formative only when the teacher or the learner actually adapts because of it, which means a quiz filed away unread is not formative assessment at all. [1]
How it works
One widely used definition calls it a process used by teachers and students during instruction that provides feedback to adjust ongoing teaching and learning. [1] Three steps have to line up: gather evidence, read it, act on it.
Summative assessment is the contrast. It measures what has been learned at the end of a unit or a year and reports it. The same quiz can serve either purpose. What separates them is whether the result feeds back into teaching or simply records a grade.
The idea sits inside a wider tradition called assessment for learning, which puts its weight on dialogue between teacher and student, and on the learner judging their own work, rather than on monitoring performance. [2]
Why it matters
Black and Wiliam reported in 1998 that the achievement gains from formative assessment were among the largest ever reported in education research, and that finding pushed the practice into official policy in many school systems. [2]
The size of that claim deserves care. Reviewers note the quantitative evidence is hard to interpret because comparisons across studies are not equally robust, [1] and critics argue that in practice formative assessment often degrades into mini-summative testing aimed at hitting targets rather than at learning. [2] The direction of the evidence is favorable. The exact size of the effect is not settled.
Where you will see it
- Exit tickets, mini whiteboards and cold calling in a classroom
- Comments on a draft essay before the graded version is due
- Teacher training materials and school inspection frameworks
- Workplace and clinical training that checks understanding before moving on
Example
She used a two-minute quiz as formative assessment, saw that half the class had missed the same step, and spent the next ten minutes reteaching it.
Often confused with
Summative assessment sums up learning after teaching, for a grade or a certificate. Formative assessment happens during teaching and exists to change it. [1]
Key facts
- Formative assessment is a process used by teachers and students during instruction that provides feedback to adjust ongoing teaching and learning.1
- Assessment becomes formative only when the evidence gathered is actually used to adapt the teaching to learners' needs.1
- Black and Wiliam reported in 1998 that the achievement gains were among the largest ever reported in education research.2
- Reviewers caution that the quantitative evidence is difficult to interpret because comparisons across studies are not equally robust.1
- Critics argue that in practice formative assessment often degrades into mini-summative assessment focused on meeting targets.2
Related concepts
Quick checkWhat makes an assessment formative rather than summative?Show answer
The evidence is gathered during teaching and used to change it, instead of recording achievement at the end.
Sources
- Florida Journal of Educational Administration and Policy. Formative Assessment: Policy, Perspectives and Practice, by Ian Clark, volume 4, issue 2. Spring 2011 (accessed 28 September 2026)
- Educational Studies in Japan: International Yearbook. The Possibilities and Limitations of Assessment for Learning, by Shuichi Ninomiya. 2016 (accessed 28 September 2026)
Editorially reviewed by Specialty Digest Editorial TeamLast reviewed September 28, 2026Researched and drafted with AI assistanceReport an issue