🌟 Overview
AC9M2M01 helps Year 2 students measure and compare objects using informal units instead of formal units like metres, litres, and kilograms. Students learn that the unit must stay the same, and they also explore when a smaller unit gives a more accurate result.
This topic builds practical measurement skills through hands-on activities, comparisons, and simple explanations. Students use objects, pictures, and tools to decide which item is longer, holds more, or is heavier.
📂 Subtopics Included
Includes engaging videos and worksheets for. Please click on the link to access the worksheets and videos for each subtopic:
| Step | Lesson | What You Learn |
|---|---|---|
| 1 | 📏 Measuring Length Activities: Informal Units, Examples and Worksheets | 📏 measure length using informal units. ✏️ choose a suitable unit for different objects. 👀 compare which object is longer or shorter. |
| 2 | 🧪 Measuring Capacity Activities: Informal Units, Examples and Worksheets | 🥤 measure capacity using informal units. 🍶 choose a suitable unit for different containers. 👀 compare which container holds more or less. |
| 3 | ⚖️ Measuring Mass Activities: Informal Units, Examples and Worksheets | ⚖️ measure mass using informal units. 👀 compare which object is heavier or lighter. 🧱 use balance scales to check mass. |
📚 Curriculum Reference
The ACARA content descriptor for AC9M2M01 is: “Measure and compare objects based on length, capacity and mass using appropriate uniform informal units and smaller units for accuracy when necessary.”
The Mathematics Hub planning resource places this in Year 2 Measurement under Informal measurement, showing that the topic is part of a broader measurement sequence.
🔗 Related Learning Areas
These topics work well alongside AC9M2M01:
- 🔢 Recognise, Represent and Order Numbers to 1000 (AC9M2N01)
- 🔟 Partition, Rearrange, Regroup and Rename Two- and Three-Digit Numbers (AC9M2N02)
- ➕ Addition & Subtraction(AC9M2N04)
- 🧩 Multiplication & Division(AC9M2N05)
- ➕ Additive Number Patterns & Missing Numbers (AC9M2A01)
- 🧠 Year 2 Addition Facts to 20 (AC9M2A02)
📝 Helpful Tips
- Start with real objects before moving to worksheets so students can feel the difference between long, short, heavy, and light.
- Use the same unit every time and show what happens when you do not, because this is one of the most important ideas in measurement.
- For length, choose longer units for longer objects and smaller units for smaller objects when you want more accuracy.
- For capacity, let students pour, scoop, and compare so they can see which container holds more and why.
- For mass, use balance scales and encourage students to explain which object is heavier using simple comparison language.
- Ask students to say why their answer makes sense, not just what the answer is. This helps them build measurement reasoning as well as skill.