All lessons › Rethinking Waste › Lesson 1
Australian primary science · Years 3–6 · differentiated · Lesson 1 of 2
Rethinking Waste · Years 3–4
Inquiry question: Which packaging materials are most useful, and what happens after disposal?
Marked no materials needed
Analysing secondary data
What students learn
Use human impact and scientific evidence to compare possible responses to a real-world question.
Success criteria
- I can describe a connection and use a table to support my idea.
- I can imagine two possibilities and compare two choices.
- I can explain what I would check next.
Preparation and materials
Before this lesson: Students have met the linked core science idea; model data-reading first if needed.
See the interactive lesson for preparation and material requirements.
Teacher setup
- Open the supplied simulated data; choose the year-band task.
- Plan two 30-minute sessions, or one 60-minute lesson. Optional local investigations require additional equipment and a school safety check.
Safety and adaptations
- Use supplied data indoors. Outdoor work requires teacher supervision and school approval. Never enter floodwater, light fires, touch hot surfaces or disturb wildlife.
Review your school policies and curriculum requirements before teaching.
How to investigate
The lesson sequence should leave pupils with evidence to interpret, not only an activity to finish.
- Notice: Which packaging materials are most useful, and what happens after disposal?
- Understand: read the science and compare the simulated data. Choose packaging for a pretend lunch. Explain one useful property, what happens after use and a disadvantage of your choice.
- Imagine: describe two possible futures, one with a change and one without. Say what you are assuming.
- Design: compare two solutions, including who benefits, resources needed and a disadvantage.
- Test: Design a fair test of one packaging property with clean, safe samples, or compare the supplied evidence. Check the local council’s rules before making a recycling claim.
- Reflect: explain your recommendation, what is uncertain, and how your thinking changed.
Teacher modelling prompt
Think aloud: “The example table suggests a pattern. It is simulated, so it is not evidence about our school. I need further observations before making a local claim.” Model one comparison from the table.
Record and explain evidence
Recording question: Which packaging materials are most useful, and what happens after disposal?
| Option / trial | Evidence or measurement | Benefit and limitation |
|---|---|---|
| ________________ | ________________ | ________________ |
Example recording headings; record actual observations, including inconclusive results.
Discussion prompt
Compare these claims and justify your answer.
Provided example or reference data
SIMULATED DATA — invented for practising reasoning; not measured at a real school
| Packaging option | Uses before disposal in this example | Water for each wash (mL) |
|---|---|---|
| Single-use paper wrap | 1 | 0 |
| Reusable container | 20 | 200 |
| Reusable fabric wrap | 10 | 100 |
Check the data source in the teacher lesson. Illustrative or fictional data are not measurements collected by your class.
Check understanding
What should pupils know? Explain one science connection behind your proposal.
Explain with evidence: Which evidence influenced you, and what is one limitation?
Apply the idea: What would you investigate before a real decision?
Teacher answer guidance and saved classroom work are available through the main lesson experience where supported.