Every teacher evaluates students – but not all evaluation works the same way or serves the same purpose. Two of the most important approaches in educational assessment are formative evaluation and summative evaluation. Understanding the difference between them is not just a theoretical exercise; it directly shapes how teachers teach, how students learn, and ultimately how success in a classroom is defined. Educational researcher Terrance Crooks, in his landmark 1988 review of over 4,000 studies on classroom evaluation, found that formative assessment consistently produced stronger effects on student learning than summative approaches – a finding that fundamentally changed how educators think about assessment.
Table of Contents
What is formative evaluation?
As Gronlund explains, formative evaluation is used to monitor the learning progress of students during the period of instruction. Its main objective is to provide continuous feedback to both teacher and student concerning learning successes and failures while instruction is still in process. In the words of Crooks and Gronlund, formative evaluation is essentially a “continuous assessment” – a steady, ongoing process aimed at monitoring and improving student progress as learning unfolds, not after it has concluded.
The core idea is simple: rather than waiting until the end of a term to find out how students are doing, teachers use formative evaluation to track understanding in real time. This allows both the teacher and the student to make adjustments before gaps in knowledge become entrenched.
Wikipedia’s overview of formative assessment notes that the term was first coined by Michael Scriven in 1967 and later expanded by Benjamin Bloom in 1968, who used it to describe a tool for improving the teaching-learning process. Today, it is understood as any range of formal and informal assessment procedures conducted during the learning process to modify teaching and improve student attainment.
Key characteristics of formative evaluation
Formative evaluation has several defining characteristics that set it apart from other types of evaluation:
Continuous and ongoing. Formative evaluation does not happen once; it is woven into day-to-day instruction. Yale University’s Poorvu Center for Teaching and Learning describes it as being employed “while learning is ongoing,” collecting information on whether course objectives are being met and how teaching can be improved.
Focused on feedback, not grades. The goal is not to assign a mark but to generate information that guides the next steps of instruction. Feedback to students reinforces successful learning and identifies specific errors that need correction. Feedback to teachers provides information for modifying instruction and prescribing remedial work.
Flexible in its tools and methods. Formative evaluation uses a wide variety of instruments – classwork, homework, informal tests, classroom discussions, peer assessments, short quizzes, and teacher observations. Kansas State University’s assessment toolkit notes that formative assessment helps students take ownership of their learning, encourages self-reflection, and enables instructors to tailor their teaching to meet student needs.
Low stakes. Because formative evaluation is about improvement rather than judgment, it typically does not carry significant weight in a student’s final grade. This reduces anxiety and encourages honest engagement with the material.
Diagnostic in nature. Formative evaluation helps locate specific learning difficulties or weaknesses during instruction and supports the teacher in providing appropriate remedial measures. As Gronlund noted, it provides “first-aid treatment for simple learning problems.”
What is summative evaluation?
Where formative evaluation runs alongside learning, summative evaluation comes at the end. According to Gronlund, summative evaluation is designed for final grading and judging the overall effectiveness of an educational program. It is the point at which all learning is measured against predetermined standards or objectives – providing a conclusive picture of what a student has achieved over an instructional period.
Summative evaluation is the type of assessment most people instinctively think of when they hear the word “exam.” Annual examinations, half-yearly tests, end-of-unit assessments, final projects, and public examinations are all classic examples. Yale’s Poorvu Center describes them as assessments that aim to “sum up” student learning through measurable outcomes – almost always formally graded and often heavily weighted in a student’s overall performance record.
Key characteristics of summative evaluation
Terminal in timing. Summative evaluation occurs at the end of an instructional period – the conclusion of a lesson, unit, semester, or academic year. It does not provide opportunities for in-process adjustment.
Focused on overall achievement. Rather than targeting specific gaps, summative evaluation assesses cumulative knowledge and skills across a broader period of learning. Research published in the Global Scientific and Academic Research Journal of Education describes summative assessment as providing “a snapshot of students’ overall achievement in relation to predetermined standards or learning objectives” (Gronlund & Brookhart, 2016).
Evaluative, not diagnostic. The purpose of summative evaluation is to render a final judgment – to grade, rank, classify, certify, or promote students. It is not concerned with identifying how or why a student struggled; it documents the outcome.
High stakes. Because summative assessments often determine final grades, certifications, or academic progression, they carry significant consequences for students. This also means they serve accountability functions for institutions, parents, and policymakers.
Standardized and formal. Unlike the flexible instruments of formative evaluation, summative assessments tend to be more structured, with consistent grading criteria such as rubrics applied uniformly across all students.
The key differences between formative and summative evaluation
While both approaches are essential parts of any well-designed educational system, they differ fundamentally across several dimensions. The table below captures the most important distinctions:
Purpose: Formative evaluation aims to improve learning by providing ongoing feedback during instruction. Summative evaluation aims to measure and record what students have learned at the end of an instructional period.
Timing: Formative evaluation is continuous, occurring throughout the learning process. Summative evaluation is terminal, taking place at the conclusion of a unit, course, or academic year.
Feedback: Formative evaluation provides immediate, constructive, and actionable feedback while the student still has time to adjust. Summative evaluation provides a final judgment on performance – there is no opportunity to revise or respond to it within the same instructional cycle.
Stakes: Formative evaluation is generally low stakes, with little to no impact on a student’s final grade. Summative evaluation is typically high stakes, directly influencing grades, certifications, and academic progression.
Focus: Formative evaluation focuses on the process of learning – identifying what is working and what needs attention. Summative evaluation focuses on the product of learning – what was ultimately achieved.
Agent of change: Formative evaluation empowers both teacher and student to make real-time adjustments. Summative evaluation provides information primarily for institutional decision-making – about grades, promotion, or program effectiveness.
Robert Stake’s analogy: the cook and the guests
Perhaps no explanation of the formative-summative distinction has proven as enduring or as clear as the one attributed to Robert E. Stake, the renowned educational evaluation theorist from the University of Illinois. As documented in a 2016 profile published in the American Journal of Evaluation, Stake is widely credited with the following analogy:
“When the cook tastes the soup, that’s formative; when the guests taste the soup, that’s summative.”
The analogy is deceptively simple but remarkably precise. As educator Robert Kaplinsky explains, when a cook tastes the soup during preparation, the primary interest is in getting information that allows modifications before the dish is done. The cook can add salt, adjust the heat, or change the seasoning – the process is still open, and change is still possible. This is exactly what formative evaluation does: it gathers information during learning, while there is still time to act on it.
When the guests taste the soup, however, the dish is finished and served. No further adjustments can be made by the cook. The guests offer their opinions, which result in a final verdict – satisfying or not. This mirrors summative evaluation: it comes after the learning is complete, and its outcome is a judgment rather than a guide. As evaluation scholar Michael Quinn Patton elaborates, anything done to the soup during preparation in the kitchen is improvement-oriented; when the soup is served, a summative judgment is rendered by those who consume it.
The beauty of Stake’s analogy lies in what it clarifies: both the cook and the guests taste the soup, but they do so for entirely different reasons. Similarly, both formative and summative evaluations assess student learning – but they serve fundamentally different purposes and operate at different points in the educational journey.
Why both types of evaluation matter
In practice, formative and summative evaluations are not rivals – they are partners. Research reviewed at Yale’s Poorvu Center shows that formative assessments can bolster students’ motivation, improve metacognition, and enhance performance on eventual summative assessments. Put differently, the ongoing tasting by the cook makes the final meal better for the guests.
Conversely, summative evaluation is not without value. When carefully designed to test application of skills rather than rote memorization, it can promote deeper learning and provide a meaningful measure of student growth. A study published in PMC notes that summative assessment is essential for determining students’ grades, certifications, or academic pathways – and when those high-stakes outcomes are approached thoughtfully, they can also motivate students to consolidate and organize what they have learned.
The problem arises when one type is used exclusively. A classroom without formative evaluation leaves students without a compass during learning – they may not realize they are lost until the final exam reveals it. A system without summative evaluation, on the other hand, lacks clear benchmarks for achievement and accountability. The most effective educational environments use both deliberately and in combination, letting formative evaluation guide the journey and summative evaluation mark its completion.
What do you think? Reflect on your own experience as either a teacher or a student – has formative feedback ever changed the way you approached a subject before a final exam? And in your view, does the current balance between continuous assessment and terminal exams in most schools truly reflect the needs of learners?
References
- https://www.ncme.org/community/ncme-committees/classroom-assessment/classroom-assessment129
- https://www.yourarticlelibrary.com/statistics-2/evaluation-in-teaching-and-learning-process-education/92476
- https://en.wikipedia.org/wiki/Formative_assessment
- https://poorvucenter.yale.edu/teaching/teaching-resource-library/formative-summative-assessments
- https://www.k-state.edu/assessment/toolkit/basics/formativesummative.html
- https://www.researchgate.net/publication/378343193_Understanding_the_fundamental_differences_between_formative_and_summative_assessment
- https://eric.ed.gov/?id=EJ1102378
- https://robertkaplinsky.com/why-do-we-assess-students/
- https://freshspectrum.com/summative-formative-and-developmental/
- https://pmc.ncbi.nlm.nih.gov/articles/PMC9468254/
Leave a Reply