What students learn in AC9M2M01
This unit helps students build a clear, usable understanding of Measure and compare objects based on length, capacity and mass.... The goal is not to memorise one answer pattern. Students should be able to explain the idea, recognise it in a new example and apply it in a short practice or worksheet task.
- Start with the main idea: measure and compare objects based on length, capacity and mass using appropriate uniform informal units and smaller units for accuracy when necessary.
- Use concrete examples, pictures, oral explanation and short written responses before moving to independent practice.
- choosing suitable informal units to measure the length of a range of objects; justifying their choice of a longer unit to measure things that are long, such as the width of a room, and a shorter unit to measure shorter things or when more accuracy is needed comparing the capacity of several containers using sand and units such as a spoon or cup, to say which container will hold the most and how much more it will hold; recording the results, writing an explanation of their measurement process, including using smaller units to be more accurate, and justifying the result
- Finish with mixed questions so students must choose the correct strategy rather than copy the last example.
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 but may not appear in the initial eight-question activity.
- Content description: measure and compare objects based on length, capacity and mass using appropriate uniform informal units and smaller units for accuracy when necessary
- E1: choosing suitable informal units to measure the length of a range of objects; justifying their choice of a longer unit to measure things that are long, such as the width of a room, and a shorter unit to measure shorter things or when more accuracy is needed
- E2: comparing the capacity of several containers using sand and units such as a spoon or cup, to say which container will hold the most and how much more it will hold; recording the results, writing an explanation of their measurement process, including using smaller units to be more accurate, and justifying the result
- E3: using balance scales to compare the mass of several objects, selecting an appropriate informal unit; counting the number of informal units to determine which object is heavier and how much heavier; explaining why the informal units chosen need to be the same mass
- E4: recognising that the same informal unit needs to be used when measuring; for example, demonstrating and discussing why using different shoe lengths to measure the same distance could result in the measures being different; discussing why a smaller sized informal unit may result in a larger number of units compared to a larger informal unit
- E5: investigating First Nations Australians’ use of body parts, such as hands, as uniform informal units of measurement used to measure and compare objects; for example, in the manufacturing of nets for a particular purpose (teaching context)
- E6: investigating and comparing measurable attributes that are interpreted by First Nations Australians to understand animal behaviour such as the length, width and depth of animal tracks (teaching context)
How to use this unit
Read the topic guide, use the teacher slide for instruction, then complete the Worksheet, Practice and Test. These three activities use the same eight-question unit bank.
Teacher resource
AC9M2M01 teacher slide
Use this one-page PDF to introduce the key idea, vocabulary and teaching sequence before students begin the activities.
Open teacher slide (PDF)Common mistakes to watch for
- Rushing to a rule before checking the concrete model, drawing or number sentence.
- Using the correct answer once but not being able to explain why it works.
- Mixing up similar vocabulary such as more/less, before/after, longer/shorter or equal groups/sharing.
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.
| Region | Curriculum | Closest mapping |
|---|---|---|
| Australia | Australian Curriculum v9.0 | AC9M2M01 — measure and compare objects based on length, capacity and mass using appropriate uniform informal units and smaller units for accuracy when necessary |
| Victoria | Victorian Curriculum F-10 | Year 2 Maths: closest match in Measurement. Use this page as a VIC-aligned practice and worksheet reference. |
| NSW | NSW Curriculum | Stage 1 Maths: closest content focus for Measure and compare objects based on length, capacity and mass... and related outcomes. |
| United States | Common Core / NGSS | Grade 2 Common Core Mathematics/ELA closest topic match for Measure and compare objects based on length, capacity and mass.... |
| England / UK | National Curriculum | Key Stage 1 / Year 2: closest programme-of-study match for Measure and compare objects based on length, capacity and mass.... |
| Canada | Provincial and territory curricula | Grade 2 closest topic match. Canada varies by province, so use this as a broad Ontario/BC-style learning outcome reference. |
| New Zealand | New Zealand Curriculum | Level 1 Maths: closest achievement-objective topic for Measure and compare objects based on length, capacity and mass.... |
| India | NCERT / CBSE | Class 2 closest NCERT/CBSE topic match for Measure and compare objects based on length, capacity and mass.... |