How the computer science teacher can use questioning to build learning

Why questioning matters in Computer Science

Questioning can easily end up as a quick check at the end of the lesson. A couple of hands go up. Someone gives the right answer. You breathe out and move on.

But that does not always tell you much. More importantly, it misses one of the best things questioning can do. Used well, questioning can actually help create learning, not just test it.

Henry L. Roediger III and Jeffrey D. Karpicke are two cognitive psychologists whose research really helped shift how we think about learning. Their work showed that pupils remember more when they actively pull information back out of their memory, rather than just rereading notes or going over the same content again. This idea, often called the testing effect, is a helpful reminder that questioning can do far more than assess learning. It can actually strengthen it.

A strong question does more than check whether pupils were listening. It focuses attention, helps pupils retrieve or build an idea and gives you useful information about what to do next. So questioning is not a bolt-on at the end. It is the lesson.

Testing questions and teaching questions

Testing questions and teaching questions both matter, but they do slightly different jobs in the classroom.

Testing questions are mainly about judgement. They help you see what pupils can do, remember or explain at a particular moment in time. They’re useful at the end of a lesson, after a topic or for an assessment.

Teaching questions do something different. They are not just there to check whether learning has happened. They help create it. A well-timed question can help pupils spot patterns, make links, explain their thinking and uncover misconceptions before they become embedded. It slows thinking down to give pupils the chance to rehearse, refine and strengthen what they know.

That is why questioning should not sit only at the assessment end of teaching. Used well, it becomes part of the learning process itself. It helps pupils think harder, remember more and make better sense of new material.

You need both. There is absolutely a place for questions that assess what has been learned. But there is just as much value in questions that help pupils get there in the first place.

Four purposes of questioning in Computer Science lessons

1. Retrieval. Bringing knowledge back to the surface

Retrieval questions help pupils pull information out of memory. That act of bringing knowledge back to mind strengthens it, making it more likely that they will remember it later and helps to make the learning stick.

These kinds of questions work best when they are short, focused and used regularly. They can be a quick way to revisit prior learning at the start of a lesson, between activities or before moving on to something new.

Over time, they help stop knowledge from fading between lessons and give pupils more confidence because the content feels familiar rather than forgotten.

Example retrieval questions you can use:

• What does each binary digit represent?

• What is phishing?

• What is the difference between a LAN and a WAN?

Retrieval questions need to be short and frequent.

2. Diagnosis. Finding misconceptions early

Diagnostic questions are designed to reveal the wrong or missing idea.

They help you see how a pupil is thinking, which is often far more useful than simply knowing they got something wrong. A pupil might give an incorrect answer because they have forgotten something but they might also give it because they are holding onto a misconception that feels completely logical to them.

The goal of diagnostic questions is not to catch pupils out or make them feel foolish, it is to bring misconceptions to the surface early, while there is still time to address them.

Example diagnostic questions you can use:

• A strong password is all you need to keep an account secure. True or false? Explain your answer.

• A student used AI to answer a homework question and says, “It sounded confident, so I knew it was right.” What is the flaw in that thinking?

• Put these statements into two groups: those that describe packet switching correctly and those that do not.

The point of a diagnostic question is not simply to find out who is wrong. It is to find out what wrong idea might be sitting underneath the answer. Once you can see that you can address those misconceptions or gaps in your teaching.

3. Construction. Helping pupils build new understanding

These questions are asked while pupils are learning something new. The job of construction questions is to help pupils build meaning.

Rather than checking whether an answer is right or wrong, they help pupils connect new knowledge to what they already know, notice cause and effect and begin to explain how or why something works.

This is where questioning really becomes a teaching tool. A well-placed question can slow pupils down just enough to think properly, rather than rushing to the first answer that comes to mind. It can help them test an idea, refine their understanding and see the logic behind a concept.

Example construction questions you can use:

• What do you think would happen to network performance if every packet had to follow exactly the same route?

• If a company can collect lots of user data, does that always mean it should? Why?

• What do you think would happen to a digital sound file if the sample frequency increased?

These questions work well because they take pupils beyond simple recall and are often asked before you fully explain the idea, giving pupils a chance to think it through and begin making the connection for themselves.

Construction questions help pupils explore relationships, consequences and purpose. And is often the point where understanding starts to deepen.

4. Deepening. Making thinking visible and stretching it

Deepening questions take pupils beyond the first correct answer. They ask pupils to justify, compare, refine and challenge their thinking.

Pupils need to explain ideas, apply them in unfamiliar contexts and think with a bit more precision.

Examples of deepening questions you can use:

• Two-factor authentication improves security, but does it solve every problem? What are its limits?

• A star topology is often described as reliable. In what way is that true and in what way is it not?

• A binary shift can be efficient but when might it be less useful than another method?

This is where pupils move beyond short answers and into the richer thinking that exam questions often demand.

Types of questions to use in the classroom

Different questions do different jobs. Some help pupils remember, some help you spot misconceptions and some push thinking further.

The key is choosing the right type of question for the moment.

• Closed questions: These have a short, specific answer and are useful for checking core knowledge quickly i.e. What does RAM store?

• Open questions: These require pupils to explain, justify or explore an idea in more depth i.e. Why is RAM needed if a computer already has secondary storage?

• Probing questions: These follow an initial answer and push the pupil to say more or be more precise i.e. You said encryption keeps data safe. How does it do that?

• Hinge questions: These are asked at a key point in the lesson to help you decide whether pupils are ready to move on i.e. Which address changes when a device moves networks, the IP address or the MAC address?

• Sequenced questions: These build gradually from simple recall to deeper thinking, helping pupils manage the thinking step by step i.e. What is phishing? Why does it work? How could a user reduce the risk of falling for it?

How to build questioning into everyday lessons

What makes the difference is not the performance of questioning. It’s the routine of it.

For most of us, the biggest barrier is not knowing that questioning matters but feeling as though good questioning must be clever, elaborate and time-consuming.

However, questioning works best when it becomes a normal part of the lesson rhythm.

Questions used at the right moments can do far more than one big discussion that only a few pupils take part in.

A simple structure like this is often enough:

1. Two retrieval questions at the start: Use these to bring back key knowledge from previous lessons. This helps pupils reactivate what they already know and gives you a quick sense of what is still secure and what may need revisiting.

2. One diagnostic question before independent work: Ask something that is likely to expose a common misconception. This gives you the chance to deal with muddled thinking before pupils practise it and reinforce it.

3. One hinge question before you move on: This is the checkpoint. If pupils cannot answer it securely, they are not ready for the next step yet. If they can, you can move forward with more confidence.

4. One deepening question to finish: End with something that pushes pupils beyond recall. Ask them to justify, compare, explain a trade-off or apply the idea in a slightly different context.

That’s it, a few deliberate pauses in the lesson where thinking is made visible.

Over time, those small routines add up. Pupils get used to retrieving knowledge, explaining their ideas and thinking more carefully. You get better information about what they understand and where they are stuck. Most importantly, questioning stops being something bolted on at the end and starts becoming part of how learning happens in the room.

Common questioning mistakes in teaching

There are a few common questioning pitfalls that can make a lesson feel busy without actually making pupils think any harder.

Only asking volunteers

The same confident pupils will nearly always put their hands up first. That can give the impression that the whole class understands, when really you are hearing from the few who are quickest to respond. Whole-class response methods help move the thinking from a handful of pupils to everyone. Easy ways you can do this might be to use whiteboards, cold calling or, my favourite, a short, paired discussion first and then share it with the whole class. The goal is not just participation. It is making sure every pupil has to process the question.

Moving on too fast

Sometimes a question is asked and answered so quickly that there is barely any thinking time at all. If we want better answers, pupils need a few quiet seconds to actually think. Wait time can feel awkward at first, especially in a busy classroom, but if you rush to fill it, or take the first hand up straight away, you often only hear the fastest thinker rather than the deeper one.

Accepting the first correct answer

A correct answer is useful but it is not always the end of the story. Sometimes pupils arrive at the right answer for the wrong reason or only understand it at a very surface level. Probing once more helps you see whether the understanding is secure. A simple follow-up like Why? How do you know? or Can you explain that another way? can turn a quick check into a much richer teaching moment.

Asking open questions with no support

Open questions can be powerful, but they can also leave some pupils floundering if they do not know how to begin. Instead you can offer scaffolding such as displaying a list of key words, sentence starters, paired discussion or a sample model answer can help pupils organise their thinking and respond with more confidence. Support does not lower the challenge but it does give pupils a way into it.

Good questioning is not just about asking better questions. It is also about creating the conditions for better answers.

A gentle reminder

If questioning feels hard it is usually because you are trying to do too much at once. Start small and pick one method to try out and get comfortable with before you try the next.

If you want questioning to be consistent, the biggest help is removing the planning load. When your lessons already include retrieval, diagnostic checks and model answers it becomes much easier to keep the routine going, even in the weeks where you are running on fumes.

If you would like more ready to use units which includes a variety of questions to help support learning, that is exactly the kind of support I build into my Computing Classroom membership.

Frequently asked questions about questioning in Computer Science

What is effective questioning in Computer Science?

Effective questioning in Computer Science means using planned questions to support learning, check understanding and uncover misconceptions during the lesson. It helps pupils retrieve prior knowledge, explain their thinking, make links between ideas and apply concepts in different contexts.

How do questioning strategies improve learning?

Questioning strategies improve learning because they make pupils think actively about what they know and how ideas connect. In Computer Science, questioning strengthens recall, helps teachers identify misconceptions and supports deeper understanding.

What is the difference between retrieval and diagnostic questions?

Retrieval questions supports memory and help pupils bring previously learned knowledge back to mind. Diagnostic questions reveal misconceptions or errors in thinking.

What is a hinge question in teaching?

A hinge question is a question asked at an important point in the lesson to check whether pupils are ready to move on. It helps the teacher decide whether to continue, clarify or reteach.

How can I use questioning without adding to planning time?

Build simple questioning routines into your lessons. Start with two retrieval questions, use one diagnostic question before independent work, ask one hinge question before moving on and finish with one deepening question. This keeps questioning manageable and consistent without piling more onto your workload.

If you’d like a handy guide to go with this post, you can download the questioning toolkit here. No sign-up needed, just a useful resource you can start using straight away.