AC9S3I02 • Year 3 Science

AC9S3I02: Use provided scaffolds to plan and conduct investigations to answer questions or test predictions, including identifying the elements of fair tests, and considering the safe use of materials and equipment

use provided scaffolds to plan and conduct investigations to answer questions or test predictions, including identifying the elements of fair tests, and considering the safe use of materials and equipment

What students learn in AC9S3I02

Students learn to use provided scaffolds to plan and conduct investigations to answer questions or test predictions, including identifying the elements of fair tests, and considering the safe use of materials and equipment. They use the visual model, precise vocabulary and evidence to explain and apply the concept.

Learning routine: Observe → Model → Investigate → Record → Explain

Success looks like

  • Recognise changed variable
  • Use measured variable
  • Explain controlled variable
  • Apply in a new context
  • Justify with evidence
Key vocabulary
changed variable
the factor deliberately changed
measured variable
the outcome observed or measured
controlled variable
a condition kept the same
Concept models and worked thinking

Plan a fair paper-towel test

ElementPlanchangepaper-towel brandmeasuremL absorbedkeep samesheet size, water, timerepeat3 trials

Use the labels and relationships in the model to explain the central idea.

  1. Read every label and identify what each quantity or feature represents.
  2. Describe the relationship shown by the model.
  3. Check that the conclusion answers the original question.

Build a safe procedure

check hazards→choose equipment→write steps→teacher check→conduct→clean up

Transfer the idea to a new example and justify the choice with evidence.

Apply the same relationship to the new context, then justify the answer using the labels and evidence shown.

Curriculum coverage and elaborations

The content description and elaborations below show the curriculum ideas taught in this unit. Items marked as teaching context support lesson planning.

  • Content description: use provided scaffolds to plan and conduct investigations to answer questions or test predictions, including identifying the elements of fair tests, and considering the safe use of materials and equipment
  • E1: collaboratively identifying and ordering the steps in an investigation
  • E2: using a provided framework or graphic organiser to plan and identify what to change, what to keep the same and what to measure to make a test fair
  • E3: examining an example of a soil profile after soil has settled in water and planning an investigation to compare and contrast the components and particle sizes of different soils
  • E4: planning an investigation to determine which material is the best to keep substances cold
  • E5: discussing safety rules to follow when conducting investigations, such as following teacher instructions, manipulating equipment and materials with care and wearing appropriate personal safety gear, such as gloves, safety goggles and face masks when handling soils
  • E6: consulting with First Nations Australians to guide the planning of scientific investigations, including safety considerations for field investigations (teaching context)
Cultural safety for First Nations elaborations

Use reliable, community-approved sources and identify the specific Nation, People or community where the source does. Do not present diverse First Nations knowledges as one generic tradition. Follow local cultural and intellectual property protocols before reproducing cultural material or inviting community participation.

Guided learning activities

1. Model and notice

Use the visual model to identify changed variable, then explain the important features.

ElementPlanchangepaper-towel brandmeasuremL absorbedkeep samesheet size, water, timerepeat3 trials

2. Apply and compare

Apply measured variable to a new example and compare the result.

check hazards→choose equipment→write steps→teacher check→conduct→clean up

3. Create and explain

Create an example using changed variable, measured variable and controlled variable.

changed variablemeasured variablecontrolled variable
Revision Notes

Core idea: Students learn to use provided scaffolds to plan and conduct investigations to answer questions or test predictions, including identifying the elements of fair tests, and considering the safe use of materials and equipment. They use the visual model, precise vocabulary and evidence to explain and apply the concept.

Remember

  • Recognise changed variable
  • Use measured variable
  • Explain controlled variable
  • Apply in a new context
  • Justify with evidence

Important questions

  • In a test of paper-towel brands, what should be changed? Explain using the model or evidence above.
  • Complete the fair-test rule. Explain using the model or evidence above.
  • Explain plan a fair paper-towel test. Explain using the model or evidence above.
  • Correct: Several factors changed. Explain using the model or evidence above.
How to use this unit

Read the topic guide and use the teacher slide for instruction. Students can then use the worksheet for written work, open Practice for supported feedback, or take the Test when they are ready.

AC9S3I02 teacher slide

Teacher resource

Use this one-page PDF to introduce the key idea, vocabulary and teaching sequence before students begin the activities.

Open Classroom View
Common misconceptions
  • Several factors changed — Change one tested factor at a time.
  • Feature named without effect — Explain how the feature changes meaning or outcome.
  • One example treated as a rule — Test the idea with another example.
International curriculum mapping

This table gives closest-topic mapping for search and planning. The Australian Curriculum code is exact; overseas entries are broad equivalents because each jurisdiction structures outcomes differently.

RegionCurriculumClosest mapping
AustraliaAustralian Curriculum v9.0AC9S3I02 — use provided scaffolds to plan and conduct investigations to answer questions or test predictions, including identifying the elements of fair tests, and considering the safe use of materials and equipment
VictoriaVictorian Curriculum F-10Year 3 Science: closest match in Planning and conducting. Use this page as a VIC-aligned practice and worksheet reference.
NSWNSW CurriculumStage 2 Science: closest content focus for Use provided scaffolds to plan and conduct investigations to answer questions or test predictions, including identifying the elements of fair tests, and considering the safe use of materials and equipment and related outcomes.
United StatesCommon Core / NGSSGrade 3 NGSS science closest topic match for Use provided scaffolds to plan and conduct investigations to answer questions or test predictions, including identifying the elements of fair tests, and considering the safe use of materials and equipment.
England / UKNational CurriculumKey Stage 2 / Year 3: closest programme-of-study match for Use provided scaffolds to plan and conduct investigations to answer questions or test predictions, including identifying the elements of fair tests, and considering the safe use of materials and equipment.
CanadaProvincial and territory curriculaGrade 3 closest topic match. Canada varies by province, so use this as a broad Ontario/BC-style learning outcome reference.
New ZealandNew Zealand CurriculumLevel 2 Science: closest achievement-objective topic for Use provided scaffolds to plan and conduct investigations to answer questions or test predictions, including identifying the elements of fair tests, and considering the safe use of materials and equipment.
IndiaNCERT / CBSEClass 3 closest NCERT/CBSE topic match for Use provided scaffolds to plan and conduct investigations to answer questions or test predictions, including identifying the elements of fair tests, and considering the safe use of materials and equipment.
🎥 Optional Video Lesson

The SkillrHub lesson remains the primary learning resource. This optional video reinforces the explanation; you can complete the lesson and practice without watching.

Back to the lesson

Before you watch:

  • Pause after each worked example.
  • Try the examples yourself.
  • Return to the SkillrHub lesson before continuing.
Recommended: Designing a Trial: Crash Course Kids #44.1

Crash Course Kids — Plan a fair comparison by changing one factor and keeping others the same.

As you watch: Which things must stay the same if you compare two designs fairly?

Load video player Loads YouTube in this lesson. See the video notice below.

Try it: With an adult, plan a safe paper-ramp test. List one thing to change, what to keep the same and what you will measure.

Video unavailable, inaccurate or unsuitable for this year? Report a video problem to SkillrHub by email. You can continue with the written lesson and practice resources.

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Curriculum equivalents: Victoria, NSW and international

Curriculum equivalents for Provided scaffolds to plan and conduct investigations to answer questions...

Mapped skill: use provided scaffolds to plan and conduct investigations to answer questions or test predictions, including identifying the elements of fair tests, and considering the safe use of materials and equipment

These references identify matching or closely related learning. Curriculum sequence, terminology and depth vary, so teachers should use the mapped skill and lesson difficulty to confirm suitability.

RegionCurriculum frameworkClosest level or code
AustraliaAustralian Curriculum v9.0AC9S3I02 · Year 3
VictoriaVictorian Curriculum F–10 Version 2.0 — ScienceVC2S4I02 · Levels 3–4
New South WalesNSW Science and Technology K–6 Syllabus (2024)ST2-PQU-01 · Stage 2
United States (USA)Next Generation Science Standards (NGSS)Grade 3
Canada (Ontario)Ontario Curriculum — ScienceGrade 3
United Kingdom (England)National Curriculum in England — ScienceYear 4, Key Stage 2
IndiaNCERT / CBSE — ScienceClass 3

Australian Curriculum v9.0 is the canonical source for this SkillrHub lesson. Victoria and NSW entries name the closest published state codes or outcomes; international entries are planning references rather than claims of identical curricula.

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Topic reference: AC9S3I02 — AC9S3I02: Use provided scaffolds to plan and conduct investigations to answer questions or test predictions, including identifying the elements of fair tests, and considering the safe use of materials and equipment

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