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Heavier or Lighter?
Students will compare the weights of objects.
- Take out the scale and ask students what they think it is.
- Explain that scales are used to measure weights. Ask students if they’ve ever been weighed at the doctor’s office before. Have them compare the scales that they are weighed on with the one you have in the classroom.
Explicit Instruction/Teacher modeling(10 minutes)
- Demonstrate how to measure two objects using the balance scale. Tell students that the scale doesn’t tell you the exact weight of the objects, but instead tells you which one is heavier.
- Put two objects on the scale and show students that the heavier object drops towards the ground while the lighter object lifts up.
Guided practise(10 minutes)
- Hold up two more objects. Have students guess which object they think will be heavier. Ask students to raise their hands to share their answers.
- Repeat this process with two more objects.
Independent working time(10 minutes)
- Hand out the Comparing Weight and colour & Compare Weights of Objects worksheets. Have students complete them as you circulate around the room, providing help as needed.
- When students finish their worksheets, have them come up and take turns using the balance scale to measure objects.
- Have students work with a partner to complete the worksheets.
Assess students’ understanding by having them share out their answers to the worksheets.
Review and closing(5 minutes)
Ask students to turn and talk to a partner to share one thing they learned about measuring weight.