You will learn
- Say which object is heavier or lighter.
- Compare weights by holding or using a balance.
- Use heaviest and lightest for three objects.
- Explain that size does not always tell weight.
Version 0.1 · published for early use · expert review pending Standards alignment: pending verification. Not yet reviewed against the Courseversity scorecard.
Student lesson
Words to know
Weighs a lot.
Weighs a little.
Weighs more than.
Weighs less than.
1. Discover: a stone and a feather
Pick up a stone and a feather. Which is heavier? Which is lighter? Can a small thing be heavier than a big thing?
2. Understand: heavier and lighter
We can compare weight by holding two objects, one in each hand. The one that pulls your hand down more is heavier. The other is lighter.
A balance scale tips down on the heavier side. If it stays level, both weigh the same.
Size is not enough to tell. A big balloon is light. A small stone can be heavy.
3. Explore: hands as a balance
You need two small objects (a stone and a sponge).
- Hold one object in each hand with your arms out.
- Which hand goes down?
- Say: __ is heavier than __.
- Try with another pair. Guess first, then check.
Think about it: what did you notice?
The hand that goes down holds the heavier object.
4. Practise
Guided practice
Question 1. Is a stone heavier or lighter than a feather?
Heavier.
Question 2. A balance tips down on the left. Which side is heavier?
The left.
Question 3. Is a big balloon heavier than a small stone?
No, the stone is heavier.
Independent practice
- Name something heavier than a book.
- Name something lighter than a book.
- Which is lighter: a balloon or a brick?
- Draw a balance with the left side down.
- Explain how to compare weights with your hands.
Answers are in the answer key below. Try first, then check.
5. Apply: everyday mathematics
You carry a bag of rice and a bag of bread. Which one is likely heavier?
Show a sample answer
The bag of rice is likely heavier.
6. Common mistake
Fix: Check by holding or using a balance.
7. Check and master
Answer all questions. You will see feedback after each one.
Your result appears here after you answer every question.
8. Key takeaways
- Heavier means weighs more.
- A balance tips down on the heavier side.
- Size does not tell weight.
9. Next lesson
Next lesson: Full and empty. Keep going with the next idea in this course.
Printable worksheet
- Heavier: a stone or a feather?
- Lighter: a book or a brick?
- A balance goes down on the right. Which side is heavier?
- Is a big balloon heavier than a stone? (yes/no)
- Draw a balance with equal sides.
Homework
Use your hands to compare the weight of three things at home. Put them in order from lightest to heaviest.
Answer key and marking scheme
| Question | Expected response | Marks |
|---|---|---|
| Heavier: a stone or a feather? | stone | 2 |
| Lighter: a book or a brick? | book | 2 |
| A balance goes down on the right. Which side is heavier? | right | 2 |
| Is a big balloon heavier than a stone? (yes/no) | no | 2 |
| Draw a balance with equal sides. | level balance | 2 |
| Total | 10 |
Practice answers: Worksheet: 1 stone; 2 book; 3 right; 4 no; 5 level balance.
Quiz answers: 1 A, 2 B, 3 C, 4 A, 5 B, challenge C.
Mastery and remediation
| Objective | Bronze (Developing) | Silver (Proficient) | Gold (Advanced) |
|---|---|---|---|
| O1 Say which object is heavier or lighter | Shows this with help from an adult or a picture | Does this independently and explains how they know | Explains it clearly and uses it in a new situation |
| O2 Compare weights by holding or using a balance | Shows this with help from an adult or a picture | Does this independently and explains how they know | Explains it clearly and uses it in a new situation |
| O3 Use heaviest and lightest for three objects | Shows this with help from an adult or a picture | Does this independently and explains how they know | Explains it clearly and uses it in a new situation |
| O4 Explain that size does not always tell weight | Shows this with help from an adult or a picture | Does this independently and explains how they know | Explains it clearly and uses it in a new situation |
Proposed Courseversity thresholds for this page: Bronze = at least 3 of 5 core questions correct; Silver = all 5; Gold = all 5 plus the challenge. A badge is never a full record of progress.
If a learner struggles
- Find the misconception: Thinking the bigger object is always heavier. Check by holding or using a balance.
- Explain another way: use real objects first, then pictures.
- Show a simpler example: Compare two very different weights first.
- Guided practice: work through one example together and let the learner try the next one.
- Reassess: use the quiz again or the worksheet.
- Move on when the learner shows Silver-level evidence independently.
Teacher package
1–5. Objectives, prerequisites, materials, preparation, duration
Lesson objectives. Learners will: say which object is heavier or lighter; compare weights by holding or using a balance; use heaviest and lightest for three objects; explain that size does not always tell weight.
Prerequisite knowledge. Lessons 1 and 2.
Materials. Counters (stones, seeds or bottle tops), paper, pencils, board or chalkboard. Low-resource options: use stones, seeds, sticks, bottle tops or drawings in the sand or on the board instead of printed materials.
Preparation. Gather the counters and draw the example pictures on the board before the lesson.
Suggested duration. 35–45 minutes.
6–9. Teaching procedure, explanation notes, guided and independent activities
Introduction (5 min). Start with the Discover situation and let learners suggest ideas before you teach.
Explanation (10 min). Teach the Understand section with real objects first, then pictures, then symbols and words.
Guided activity (10 min). You need two small objects (a stone and a sponge). Learners follow the Explore steps in pairs.
Independent activity (10 min). Learners complete the independent practice and the worksheet.
Assessment and reflection (5 min). Ask each learner to say one thing they learned and how they know it.
Teacher explanation notes. Use the concrete, pictorial, abstract order: real objects first, then pictures, then symbols and words. Return to real objects whenever a learner needs support.
10–12. Differentiation, formative assessment, common misconceptions
Support. Use real objects and work with a partner; say each step aloud together. Extension. Ask learners to make up their own example and explain it to a partner.
Formative assessment. Listen to learner explanations, ask “how do you know?”, and check the independent work.
Misconceptions. Thinking the bigger object is always heavier. Check by holding or using a balance.
13–15. Assessment questions, answer keys, marking scheme
Use the quiz and worksheet on this page. The 10-mark scheme and all answers are in the answer key above. Re-check every answer and the marking scheme before publication.
16–19. Remediation, enrichment, homework, teacher reflection
Remediation. Compare two very different weights first. Enrichment. Invite learners to find or create three more examples at home or in the classroom and explain them. Homework. See above.
Teacher reflection. After teaching, record: which concepts learners understood; which misconceptions occurred; which activities worked; which learners need more practice; and what to improve next time.
Sources and standards
Alignment is pending verification and no external endorsement is claimed. Reference starting points named in the Courseversity standard: Common Core State Standards for Mathematics, Cambridge Primary and the IB Primary Years Programme. Specific standard codes will be added once checked against the official documents.