How Science Spreads in Society: a skill companion
A small set of reusable sheets that grow one way of thinking about science at Year 10 depth: why some science is taken up by society quickly and some slowly, and how evidence, cost, laws, trusted voices, clear messages and habits each help or block it. Print the scaffolds once and slot them into the science lessons you already teach.
What a skill companion is
Ideas about how science works are not a topic of their own. They grow inside the units a class teaches all year. So this pack is not a full term of lessons. It is three reusable scaffolds, a map of where they fit, and a short stand-alone lesson for teaching the idea first.
Start here: five minutes
- Read the pairing map on the next page: it gives a piece of science society took up in each Year 10 topic, what helped and what slowed it.
- Print the factor weigher when a topic touches a technology or a public message, and the case study with Newton’s laws.
- Cut out the cards once. They are reused all year.
- Open the free interactive unit on your board when you want a worked example.
- Run the one-page mini-lesson first if you want to teach the idea before folding it into a topic.
The step up from Year 9
The descriptor is the same in Years 9 and 10; the depth is not. In Year 9 students analysed why rooftop solar spread. In Year 10 they weigh six factors across three cases and compare them, follow one case from the physics of a crash to a world-first law and a change in habit, and match each barrier to the strategy that overcame it.
Science society took up, in every Year 10 topic
Good evidence is rarely enough on its own. This map gives, for each Year 10 topic, a piece of science or a practice that society took up, the factors that helped it spread, and the ones that slowed it.
| When you teach | Taken up by society | What helped | What slowed it |
|---|---|---|---|
| Heredity: Cell Division and Inheritance (AC9S10U01) | DNA evidence in courts, from the late 1980s | Very strong evidence; independent labs could check it | Early laboratory mistakes; worries about privacy |
| Evolution by Natural Selection (AC9S10U02) | Releasing a virus to control rabbits, from 1950 | Huge, visible success at first | Rabbits that survived passed on resistance: the virus became less effective |
| The Big Bang and the Universe (AC9S10U03) | The big bang model, accepted over its rival in the 1960s | A predicted glow was found in 1965 | A rival model with respected supporters |
| Energy Flow and Climate Change (AC9S10U04) | The national fire danger ratings, from 2022 | One clear system; announced by fire services and forecasters together | People had to unlearn the old ratings |
| Newton’s Laws of Motion (AC9S10U05) | Wearing seatbelts, compulsory in Victoria from 1970 | Crash evidence, surgeons speaking out, laws and fines | Habit, discomfort, and the belief that a crash would not happen |
| Atomic Structure and the Periodic Table (AC9S10U06) | Recycling aluminium cans, with a refund in South Australia from 1977 | Cash for each can; recycling uses far less energy than making new metal | Few collection points at first |
| Reaction Types and Rates (AC9S10U07) | Unleaded petrol, from 1985 | Catalytic converters need it; evidence of harm from lead | Older cars and higher prices at first |
The three moves, and the picture that backs each one
When you want a worked example on the board, open the interactive unit and use the picture that matches the move.
- Weigh what drives and what blocks uptake: “What drives, and what blocks, society relying on forecasts?”.
- Pick out the factors that really helped: “Which factors helped forecasting be relied on?”.
- See factors add up over time: “How added factors carried forecasting into everyday life”.
Which factors helped, and which held it back?
For each case, mark each factor: + if it helped society take the science up, − if it slowed it, 0 if it made little difference. Add a few words of reason. The first case is done for you.
| Factor | Wearing seatbelts | The 2022 fire danger ratings | Switching homes to LED lights |
|---|---|---|---|
| Strength of the evidence | + | ||
| Cost to people | − | ||
| Laws and rules | + | ||
| Trusted people speaking for it | + | ||
| Clear communication | + | ||
| Habits and beliefs | − |
From the physics of a crash to a world-first law
Today nearly everyone in a car wears a seatbelt without thinking about it. Sixty years ago most people did not. Follow how the science of motion became an everyday habit.
| 1950s | Crash studies show what Newton’s first law predicts: in a sudden stop, an unbelted person keeps moving at the car’s speed until the windscreen, the steering wheel or the road stops them. |
| 1960s | Surgeons who treat crash victims, including the Royal Australasian College of Surgeons, press governments to require seatbelts. |
| 1969 | New cars sold in Australia have to be fitted with front seatbelts, but many people do not wear them. |
| 1970 | Victoria’s road deaths reach a peak of 1061. On 22 December, Victoria becomes the first place in the world to make wearing a seatbelt compulsory. |
| 1971 | The other states and territories follow with their own laws. |
| Since | Fines, campaigns and later laws (including random breath testing) help road deaths fall, even as the number of cars grows; wearing a belt becomes a habit. |
Questions
Which strategy overcame each barrier?
Cut out the twelve cards. Six describe a barrier to people taking up a piece of science; six describe a strategy that has overcome barriers like it. Pair each barrier with the strategy that fits it. Then choose a case from the pairing map and say which barrier it faced.
Teacher note: the answer sheet lists the pairs. Some strategies fit more than one barrier; accept a well-argued pairing.
Why did people start wearing seatbelts?
A trolley carrying a modelling-clay passenger rolls down a ramp into a block of wood. Without a belt, the passenger flies forward, as Newton’s first law says it must; with a rubber-band belt, it stays in its seat. The evidence is clear in seconds. Yet in real life, it took surgeons speaking out, a world-first law, fines and campaigns before wearing a belt became a habit. The class asks why.
We are learning to
- explain the science behind a practice society took up,
- identify the factors that helped or blocked its uptake,
- explain why strong evidence is often not enough on its own.
Success criteria
- I can use Newton’s first law to explain what the seatbelt does.
- I can name three factors, besides the evidence, that changed what drivers did.
You need
- for each pair: a trolley or toy car, a ramp, a block of wood as a barrier, modelling clay for a passenger, and a rubber band,
- the factor weigher and case study (scaffolds 1 and 2), and the cards from scaffold 3, one set per table. Keep the ramp low and hands clear of the barrier.
Lesson flow (about 30 minutes)
| 8 min | Crash test Pairs roll the trolley into the barrier three times without a belt and three times with one, noting where the passenger ends up. Ask: “The trolley stops. Why does the passenger keep going?” |
| 7 min | The puzzle Tell the class that belts were fitted in new cars from 1969, but many people did not wear them. Show the board (see the box). Ask: “The evidence was clear. Why might people still not have buckled up?” |
| 10 min | Weigh the factors Pairs read the case study and weigh the factors for seatbelts. While they work, tables match the barrier and strategy cards. Ask: “Which factor would you remove first if you wanted fewer people to wear belts? What does that tell you?” |
| 5 min | Today Pairs pick a piece of science people are slow to take up today and name the barrier and a strategy that might work. |
Running it shorter? Do the crash test as a teacher demonstration and spend the time on the factors.
Watch for these ideas
- Thinking people ignore science because they are foolish, rather than weighing cost, habit and trust.
- Crediting one factor, such as the law, with the whole change.
- Forgetting that some barriers are reasonable, such as cost, and need a fair solution.
Make it easier, make it bigger
- Easier: give pairs the six factors as cards to rank for the seatbelt case.
- Bigger: compare seatbelts with another practice from the pairing map. Which factors mattered in both, and which in only one?
Answers and look-fors
The next sheet has the factor weigher completed, the case study answered, the card pairs, and a quick three-level guide.
Answers and look-fors
Factor weigher (columns 2 and 3)
| Factor | The 2022 fire danger ratings | Switching homes to LED lights |
|---|---|---|
| Strength of the evidence | + Built on decades of fire research and testing with the public | + Measured: far less electricity for the same light, longer life |
| Cost to people | 0 Free to use | − Dearer to buy at first, until prices fell |
| Laws and rules | + One national system replaced different ones in each state | + Rules phased out the least efficient globes |
| Trusted people speaking for it | + Fire services and weather forecasters announced it together | 0 Little needed: the savings showed on power bills |
| Clear communication | + Four levels instead of six, each with a clear action | + Star ratings and labels compared running costs |
| Habits and beliefs | − People used to the old ratings had to relearn them | − Early LEDs gave a colder light some people disliked |
Across the three cases, clear communication and laws or rules helped every time; habits slowed every one. Strong evidence was not enough for seatbelts until laws, fines and trusted voices joined it.
Case study
Newton’s first law: an object keeps moving at the same speed unless a force acts, so an unbelted person keeps going when the car stops. The belt applies that force through the strong bones of the hips and chest, and over a little more time. Fitting belts did not make people wear them: habit, discomfort and the belief that a crash would not happen to them held many back, so a law about wearing them was needed. Surgeons treated the injuries every day, had no product to sell, and spoke from direct experience. The law alone cannot be credited with the fall in deaths: fines, campaigns, random breath testing, safer cars and better roads came at the same time. The factors that turned the science into a habit: strong evidence, trusted voices, a law with fines, and repeated campaigns.
Barrier and strategy cards (pairs)
| Cards | Barrier | Strategy |
|---|---|---|
| G and A | People believed it would not happen to them. | Campaigns with real stories and clear numbers. |
| D and J | It cost money to fit or to buy. | Laws that made it standard in every new product, spreading the cost. |
| E and L | People forgot, or could not be bothered. | Fines and reminders, until it became a habit. |
| B and H | The evidence was hard to understand. | Trusted experts explained it simply, in public. |
| K and F | It was hard to get outside the cities. | Making it available everywhere: shops, schools and online. |
| I and C | People distrusted the company promoting it. | Independent groups tested it and backed it. |
A quick three-level guide
| Move | Working towards | At standard | Beyond |
|---|---|---|---|
| Science | describes the practice without its science | explains the science the practice rests on | explains why the evidence was convincing to experts |
| Factors | names one reason | weighs several factors that helped and that blocked | compares the factors across cases and finds the common ones |
| Barriers | blames people for ignoring science | matches barriers to strategies that overcame them | judges which barriers were reasonable and what a fair solution was |
In the mini-lesson, the unbelted passenger leaves the trolley every time; the belted one stays. Removing laws and fines, or trusted voices, is the change most likely to undo the habit: the evidence alone did not create it.