ASSESSMENT
Formative Assessment: Strategies to Check Understanding in Real Time
Formative assessment is feedback while it still matters. Here is how to check understanding mid-lesson and act on what you find.
By The Deckly Team9 min read
Formative assessment is checking understanding while a lesson is still happening, so you can adjust before it is too late. It is assessment for learning, not of it — the point is not a grade, but a decision about what to do in the next five minutes.
This guide explains why formative assessment is so effective and gives you strategies and tools to gather the signal quickly and act on it in real time.
Formative vs. summative assessment
Summative assessment measures learning after the fact — a final test, an exam, a grade. Formative assessment happens during learning and feeds straight back into teaching. A quiz is summative if you record the grade and move on; it is formative if the result changes what you teach next.
The same activity can be either. What makes it formative is that you use the result to adjust, immediately.
Why it works
Misconceptions are cheapest to fix the moment they form. Left undetected, a small misunderstanding compounds across a topic until it takes far more effort to unpick. Catching it with a quick check keeps everyone on solid ground.
There is a second benefit: the act of retrieving an answer strengthens memory. So a well-designed check does not only inform you — it helps students learn the material more durably.
Fast formative strategies
Effective formative assessment is quick and gets a response from everyone, not just volunteers. These techniques take a minute or two and give you a clear read of the whole room.
- Multiple-choice checks after each concept, answered by every student
- Exit tickets — one or two questions at the end of a lesson
- Confidence ratings alongside answers to spot shaky understanding
- Word clouds to surface how students describe an idea in their own words
- Hinge questions whose answers reveal a specific misconception
The step that matters: acting on the signal
Gathering the data is the easy half. The value comes from what you do with it. If a check shows a common wrong answer, stop and re-explain that point now — do not push on and hope it resolves itself.
Share the class result with students too. Seeing that half the room missed a question normalises getting things wrong and focuses everyone's attention on the fix.
Tools that make it frictionless
The right tool removes the overhead so you check understanding often. Look for one that shows the answer distribution live, lets every student respond from a device, and produces a report you can review afterwards.
With Deckly you add these checks straight into the slides you already teach from, so formative assessment becomes part of the lesson rather than a separate task.
Key takeaways
- Formative assessment is assessment for learning — the result should change your next move.
- Catch misconceptions early, when they are cheapest to fix.
- Use quick checks that every student answers, not just volunteers.
- The signal is only valuable if you act on it in the moment.
Frequently asked questions
What is an example of formative assessment?
A quick multiple-choice check after teaching a concept, where every student answers and you use the distribution to decide whether to move on or re-explain, is a classic formative assessment.
How is formative assessment different from a test?
A test is usually summative — it measures learning and produces a grade. Formative assessment happens during learning and feeds straight back into what you teach next.
How often should I use formative assessment?
Frequently and lightly. A short check every few minutes of new content catches misconceptions early and keeps attention high without adding grading load.