Teaching KS3 Computer Science can be slightly surreal.
One student is building games in Python at home.
Another has just asked where the internet is kept.
Both are looking at you.
Welcome to KS3.
But sometimes the biggest challenge isn't what we're teaching. It's how students are experiencing it.
Here are five things worth thinking about.
1. Your confident students might be lying to you
Not intentionally.
You ask a question.
Three hands shoot up.
Correct answer.
Excellent. Everyone understands.
Except… maybe they don't.
The same confident students can carry an entire Computer Science lesson while everyone else develops an impressive ability to look thoughtfully at the whiteboard.
Try removing the volunteers occasionally.
Ask everyone to draw it, predict it, explain it or show it.
You may discover a very different classroom.
2. Maybe they don't have anything to picture
Think about what we ask KS3 students to understand:
RAM. Algorithms. Binary. Networks. Data packets. The CPU.
Most of it is invisible.
Then we're surprised when they forget it.
Ask yourself:
What does this concept look like inside my students' heads?
If the answer is probably nothing, that's interesting.
Diagrams, physical demonstrations, analogies and visual Computer Science resources aren't just there to make lessons prettier.
Sometimes they're giving an abstract idea somewhere to live.
3. “Does everyone understand?” is a dangerous question
You explain binary beautifully.
“Everyone understand?”
Twenty-eight heads nod.
Wonderful.
Then:
“Okay. Convert 13 into binary.”
Suddenly the ceiling has become absolutely fascinating.
Recognising an explanation isn't the same as being able to use it.
Instead of asking:
“Do you understand?”
Try:
“Show me.”
Explain it. Draw it. Predict what happens next. Find the mistake. Teach it to someone else.
That's where understanding tends to reveal itself.
4. Sometimes we give students the answer before they've wanted the question
Imagine beginning a networks lesson with:
“Today we're learning about protocols.”
Thrilling.
Alternatively:
“I just sent a photo from my phone to someone on the other side of the world. How did it actually get there?”
Now there's a mystery.
Students have something to solve.
Then packets, routers, IP addresses and protocols have a reason to exist.
This works across KS3 Computing.
Start with the strange thing.
The problem.
The question.
Then give them the Computer Science that explains it.
5. The room itself tells students what kind of subject this is
Computer Science classrooms can sometimes be a little…
Computers.
Desks.
More computers.
Possibly a lonely networking diagram that's been hanging there since 2017.
But the environment matters too.
Especially at KS3, where some students are meeting Computer Science as a subject for the first time.
A bright, interesting classroom can quietly say:
This subject is creative. There are things to discover here. You belong here.
That doesn't mean covering every available centimetre of wall with definitions.
Sometimes you just need something that brings some personality into the room.
That's exactly why I created the Computer Lab Posters — a colourful inspired Computer Science display designed to brighten up a computer room, Computing classroom or ICT suite without turning the walls into another textbook.
Because the computers can be grey.
The classroom doesn't have to be.
Perhaps forgetting isn't always the problem
When students struggle with KS3 Computer Science, our instinct is often:
Explain it again.
Sometimes that's exactly what they need.
But sometimes the better questions are:
Can they picture it?
Did they ever have to use it?
Did we give them a reason to care before giving them the terminology?
Did everyone understand — or did the same three students understand?
And perhaps:
What does walking into my Computer Science classroom make students feel about the subject?
Those questions are slightly more uncomfortable.
They're also much more useful.
And if nothing else works, there is always the ancient teaching technique:
“Right. Let me draw this.”
Some things never go out of fashion.
Brighten up your Computer Science classroom
If your computer room could use a little less grey equipment cupboard and a little more personality, explore the Computer Lab Posters — a bright Computer Science classroom display designed to bring colour and Computing into the room.
Explore the Computer Lab Posters →
