Embedded Files
Core concept: Mass can be identified as an attribute that can be measured.
Learning Intention:
Learning Intention:
Students are learning that:
Students are learning that:
- mass is an attribute that describes if an object is heavy or light
- measuring helps to compare and order attributes
- arm balances can be used to accurately compare the mass of a range of objects
- describing something as 'equivalent' means that the collections or objects being compared have an attribute that is the same.
Success Criteria:
Success Criteria:
Students can:
Students can:
- compare mass using language such as heavy, heavier, heaviest, light, lighter, lightest or the same as
- estimate which object is the lightest and heaviest
- compare the mass of 2 objects by hefting and check using an arm balance
- explain that an objects mass cannot be determined just by looking at it.
Daily number sense: Cube counting – 15 minutes
Daily number sense: Cube counting – 15 minutes
Manipulate cubes, using ‘Talk moves’ to support students to predict, justify and prove their mathematical thinking. Ask students:
Manipulate cubes, using ‘Talk moves’ to support students to predict, justify and prove their mathematical thinking. Ask students:
What if I rearrange the cubes, such as stacking them in a tower? How many cubes are present now?
What if I rearrange the cubes, such as stacking them in a tower? How many cubes are present now?
What if I rearrange the cubes again, for example, by spreading them out with a significantly larger distance between them?
What if I rearrange the cubes again, for example, by spreading them out with a significantly larger distance between them?
What if I swap the colours of cubes, so they are all blue?
What if I swap the colours of cubes, so they are all blue?
What if I place them close together that they are all touching in one big rectangle?
What if I place them close together that they are all touching in one big rectangle?
What if I hide some of the blocks under other blocks?
What if I hide some of the blocks under other blocks?
Explain that, regardless of how the cubes are positioned, the total number stays the same.
Explain that, regardless of how the cubes are positioned, the total number stays the same.
Teachers toolbox mass – 15 minutes
Teachers toolbox mass – 15 minutes
What are some items you might find in a teacher's toolbox?
What are some items you might find in a teacher's toolbox?
Mass is used to describe how heavy or light something is.
Mass is used to describe how heavy or light something is.
Activity: Using teacher 'tools' (e.g. stapler, pencil, rubber, texta etc), students will make predictions on the mass of items and order the items from lightest - heaviest. Support students to talk about mass using words such as light, lighter, lightest, heavy, heavier, heaviest.
Activity: Using teacher 'tools' (e.g. stapler, pencil, rubber, texta etc), students will make predictions on the mass of items and order the items from lightest - heaviest. Support students to talk about mass using words such as light, lighter, lightest, heavy, heavier, heaviest.
What are your predictions? Why?
What are your predictions? Why?
Were your predictions close?
Were your predictions close?
What helped us to be precise mathematicians?
What helped us to be precise mathematicians?
What challenges did you have?
What challenges did you have?
Create an anchor chart based on which items are heavier/lighter. Students can then explore items that are heavier than their drink bottles.
Create an anchor chart based on which items are heavier/lighter. Students can then explore items that are heavier than their drink bottles.
Ask a student to hold an item in each hand to compare their mass and work out which is the lightest. While they are comparing, support students to talk about mass using words such as light, lighter, lightest, heavy, heavier, heaviest.
Ask a student to hold an item in each hand to compare their mass and work out which is the lightest. While they are comparing, support students to talk about mass using words such as light, lighter, lightest, heavy, heavier, heaviest.
Consolidation and meaningful practice:
Consolidation and meaningful practice:
Mass is used to describe how heavy or light something is.
Mass is used to describe how heavy or light something is.
Measuring items using an arm balance helps to accurately compare and order the Mass of items.
Measuring items using an arm balance helps to accurately compare and order the Mass of items.
Describing something as 'equivalent' means that the collections or objects being compared have an attribute that is the same.
Describing something as 'equivalent' means that the collections or objects being compared have an attribute that is the same.
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