Project Spotlight: Systems & Signals
Systems thinking sounds like something that belongs in a university course or an engineering textbook.
But children do it all the time.
They figure out how a complicated game works. They know which train connects with which line. They notice that changing one setting affects something somewhere else. They work out why a machine isn't doing what it's supposed to do. They can explain an entire fictional world's rules in extraordinary detail.
They're already looking at parts, connections, patterns, information and cause and effect.
Systems & Signals takes that kind of thinking and gives learners more ways to explore it.
What makes something a system?
The project begins with a deceptively simple question:
What makes something a system?
A bicycle has connected parts that work together. So does a washing machine. A railway network has trains, tracks, stations, signals and people. An ecosystem has countless living and non-living parts interacting with one another.
But what about a tree?
A family?
A pile of LEGO?
A sandwich?
Suddenly, deciding what counts as a system isn't quite so straightforward.
And that's where the interesting thinking begins.
Learners start looking underneath the things around them:
What are the parts?
How are they connected?
Does one part depend on another?
What goes into the system, and what comes out?
What would happen if one part disappeared?
There isn't always one correct way to answer those questions. Learners can disagree, change their minds and use what they discover to build a stronger explanation.
From connections to signals
Once learners start seeing systems, the project takes the thinking further.
How does information move around inside a system?
A pedestrian needs to know when it's safe to cross. An automatic door needs to know that someone is approaching. A washing machine needs to know when it has enough water.
Signals make that possible.
Some are obvious: lights, sounds, symbols and movements. Others might use electricity, chemicals, pressure or scent. Some are meant for humans. Others are detected by machines, animals, plants or different parts of our bodies.
Learners can follow a signal through a system:
What creates it? → Where does it go? → What detects it? → What happens next?
A child fascinated by trains could follow signalling through a railway network. Someone interested in animals might investigate how bees share information. Another learner might want to know what happens between pressing a button and a lift arriving at the right floor.
The concept stays the same. The investigation can look completely different.
What happens when a system goes wrong?
This is where Systems & Signals gets particularly interesting.
What happens when information doesn't arrive?
Or arrives too late?
What if a warning is difficult to detect? What if two signals give conflicting information? What if one small failure causes problems somewhere completely different?
Learners get to deliberately break systems, trace problems backwards and think about how they could work differently.
That also creates opportunities to think about accessibility.
A fire alarm might send a perfectly clear message to someone who can hear it. What about someone who can't? A colour-coded warning might work for one person and not another.
Sometimes the problem isn't that a person responded incorrectly.
Sometimes the system could communicate differently.
That is a surprisingly powerful idea for a Years 3–4 learner to encounter.
A natural fit for special interests
One of my favourite things about Systems & Signals is that it doesn't depend on learners being interested in a particular topic.
The system is the structure. The learner brings the subject.
That could be:
trains and transport networks
animals and ecosystems
machines and electronics
the human body
games and sport
cities and community systems
technology
a fictional world
almost anything with interacting parts
For a learner with a deep interest, this can provide a new lens for something they already know extraordinarily well.
Instead of moving them away from their interest to cover a predetermined topic, the project asks: what else could we discover from here?
Complex thinking doesn't need a complicated way in
Systems & Signals explores some big ideas.
Learners encounter connections and dependencies. Inputs and outputs. Signals and responses. Feedback. System failures. Accessibility. Models. They compare completely different systems to look for shared patterns and consider where those comparisons stop working.
But learners don't need to begin with abstract definitions.
They can begin with a toaster.
Or an ant colony.
Or a traffic light.
Or their favourite game.
And they don't all need to show their thinking in the same way.
One learner might explain something aloud. Another might draw a chaotic web of arrows. Someone might build a system with LEGO, take photographs, research an obscure question, make an animation or spend days developing a detailed model.
The thinking can become complex. The way into it doesn't have to be.
Learning to see what is happening underneath
By the later weeks of the project, learners start applying the same thinking to unfamiliar systems.
Two things that look completely different might turn out to have something important in common.
A railway network and the human circulatory system both have pathways. Both move things. Both can experience blockages.
But the comparison only goes so far. Roads don't behave exactly like living tissue.
That leads to another layer of thinking: not just what is similar?, but where does the comparison stop working?
Finally, learners use models to make complicated systems easier to investigate. They can remove a part, block a pathway, delay a signal or add a backup and predict what might happen next.
A model becomes more than something to make.
It becomes something to think with.
Giving parents something to work with, too
Interest-led learning can produce rich learning without producing a neat pile of worksheets at the end.
That can be uncomfortable when you're also trying to document a homeschool program.
Systems & Signals includes a Parent Guide, Student Guide, Australian Curriculum Registration Pack and Reporting Pack to help bridge that gap.
A conversation about why a signal failed matters. So does a LEGO model that reveals how parts connect, a diagram covered in arrows, a redesign of an inaccessible warning, or the moment a learner suddenly notices the same pattern in two completely different systems.
The documentation helps parents recognise and describe that learning without needing to turn every discovery into an assignment.
For kids who want to figure things out
Systems & Signals is particularly suited to the child who wants to know:
Why did that happen?
What tells it to do that?
What is this connected to?
What would happen if I changed this?
Why isn't this working?
Wait... do these two completely different things actually work in the same way?
Those questions can lead a very long way.
Systems & Signals Australia and Systems & Signals UK are both available now.
