Practical, formative and purposeful: Rethinking assessment in primary science

Assessment as part of learning

In primary science, assessment is most effective when it is formative, used to check understanding as learning happens, rather than simply measuring outcomes at the end. This might involve listening to students talk through their ideas, observing practical work, or reviewing responses to short tasks and activities.

When used well, formative assessment becomes a natural part of classroom practice rather than an additional task competing for time.

Why lowstakes assessment matters

Lowstakes formative assessment plays a crucial role in making assessment both effective and sustainable. Its purpose is to support learning, not labelling. Its purpose is not grading or benchmarking but identifying understanding, and misconceptions, early.

Lowstakes formative assessment plays a crucial role in making assessment both effective and sustainable. Its purpose is to support learning, not labelling.

By building in short, regular checks for understanding, teachers can:

• Spot misconceptions before they become embedded
• Adjust teaching in real time
• Build learner confidence and reduce assessment anxiety.

Crucially, these checks help students become comfortable reflecting on their own understanding, reinforcing assessment as part of the learning journey rather than a highpressure event.

Using practical work as powerful assessment

Science is uniquely suited to hands-on assessment. Practical activities allow students to demonstrate what they know and can do, even when their written responses are brief or developing. They also provide rich evidence of key scientific skills such as observing carefully, measuring accurately, recording results and following procedures.

One effective strategy is to use a practical assessment station within the classroom. A small group of learners ‒typically four to six ‒ rotates through a short practical task during the lesson, while others work independently on written or workbook activities.

At the station, learners might be asked to measure a specific volume of water or weigh a given mass, such as a set number of paper clips. The teacher can observe and check accuracy in real time, gaining immediate insight into students’ understanding and technique. Randomising values helps ensure that students demonstrate their own skills rather than relying on shared answers.

Assessing a range of scientific skills

Practical assessment stations can be adapted to assess a wide range of skills beyond measuring. These might include:

• Identifying variables in an investigation
• Selecting appropriate equipment
• Recording results clearly and accurately

By combining activities that allow for immediate feedback with others that can be reviewed later, teachers can use their time efficiently while still building a clear picture of each student's progress.

Simple low-stakes strategies that work in the classroom

Formative assessment can happen at multiple points in a lesson or topic:

• At the start, to check and activate prior knowledge
• Mid-lesson, to gauge understanding and confidence
• At the end, through reflection or exit tasks

There are many simple, effective tools teachers can use:

• Mini whiteboards, which allow teachers to see responses instantly
• Traffic light cards, giving students a quick way to signal confidence levels and enabling targeted support
• KWL charts, helping learners track what they know, what they want to learn, and what they have learned

Each of these approaches provides valuable insight without interrupting the flow of learning.

Making assessment meaningful

When assessment is embedded naturally into classroom practice, it becomes a powerful tool for learning rather than an additional burden.

In primary science, effective assessment is not about collecting more data. It is about using the right evidence at the right moment to support learning and guide next steps. When assessment is practical, purposeful and low pressure, it works for both teachers and learners.

In the next blog in this series, we’ll look more closely at what we should be assessing in primary science, focusing on scientific thinking, inquiry and language, not just factual recall.

About Pearson International Primary Science

Pearson International Primary Science is a primary science programme for international learners aged 5–11, with a strong focus on inquiry and investigative skills as learners progress towards Lower Secondary and beyond.

Assessment is embedded into everyday teaching, supporting realtime understanding and allowing pupils to demonstrate scientific thinking in ways that go beyond written language. Through practical activities, purposeful questioning and lowstakes checks for understanding, the course helps teachers build a clear picture of progress while keeping assessment manageable and meaningful.

Find out more about Pearson International Primary Science, download free teaching and learning materials and sign up to a free 60-day trial.