You will learn
- Say how buying works.
- Say how selling works.
- Act out a purchase.
- Give change.
Version 0.2 · expanded edition · built from cited public sources Content is based on the official frameworks and sources listed under Sources and standards. No official endorsement is claimed. Written in the style of common primary school assessments. No exam result is promised.
Student lesson
- A seller offers goods at a price.
- A buyer pays the price.
- Change is money given back.
- We buy and sell honestly and politely.
Words to know
to pay money for something
to give goods or services for money
money given back when you pay more than the price
a paper that shows what you bought
1. Discover: The corner shop
Ibrahim buys an exercise book at the corner shop. It costs 5 units. He gives a 10-unit note. The shopkeeper gives him 5 back as change. “Thank you,” says Ibrahim. “Thank you,” says the shopkeeper. She hands him a receipt. “Always check your change,” says Ibrahim’s mother with a smile.
Think: How much change did Ibrahim get?
2. Understand: Buy and sell
Idea 1: Selling
To sell is to give goods or services in return for money. A seller shows the price, helps customers and gives the right goods. Honest sellers give fair weight and quality.
Idea 2: Buying
To buy is to pay money for something. A buyer checks the price, asks politely and pays. If the buyer pays more than the price, the seller gives back change. A receipt shows what was bought.
Idea 3: Fair deals
A good deal is honest and polite. Both people should agree on the price and be happy. Sellers must never cheat, and buyers must never take without paying. Children should buy only with an adult’s permission.
3. Worked examples
Example 1 (I show you): Change
Pay 10, price 6.
- Subtract.
- Count.
- Say.
Answer: 4 change.
Example 2 (We do it together): Polite
Ask for an item.
- Greet.
- Ask.
- Thank.
Answer: Please and thank you.
Example 3 (You try): Check
Check change.
Show the steps and answer
- Count.
- Add.
- Say.
Answer: Right.
Did you know?
Some shops use scales to weigh goods, and in many countries the law requires scales to be checked so customers get a fair amount.
Why this matters
Buying and selling are daily skills that need honesty and care.
4. Explore: Class shop
Run a class shop with play money. Take turns as seller and buyer. Practise greetings, prices, paying, change and thanks.
- Set up.
- Act.
- Count change.
- Swap roles.
Think about it: what did you notice?
What did you notice? Counting change needs care.
5. Practise
Say it in a sentence
Use these starters when you talk about the lesson. Say them out loud.
- To buy is ___.
- To sell is ___.
- Change is ___.
- A receipt is ___.
Guided practice
Question 1. What is buying?
Paying for something.
Question 2. What is selling?
Giving goods for money.
Question 3. What is change?
Money given back.
Independent practice
Level 1: Start
- What is buying?
- What is selling?
- What is change?
- What is a receipt?
- How to speak?
Level 2: Grow
- Why check change?
- Why be honest?
- Why ask an adult?
Level 3: Stretch
- Act a purchase.
- Count change.
- Use polite words.
Answers are in the answer key below. Try first, then check.
6. Apply: Social Studies in everyday life
If you pay 10 for something that costs 7, how much change?
Show a sample answer
3.
Another one. Practise paying and change with play money at home.
Show a sample answer
Share.
7. Common mistakes
Fix: They must be honest.
Fix: Use an adult.
8. Lesson summary and revision card
- I can say how buying works.
- I can say how selling works.
- I can act out a purchase.
- I can give change.
9. Check and master
Answer all 14 questions. You will see feedback after each one.
Your result appears here after you answer every question.
10. Key takeaways
- A seller offers goods at a price.
- A buyer pays the price.
- Change is money given back.
- We buy and sell honestly and politely.
11. Next lesson
Next lesson: Prices. Keep going with the next idea in this course.
Exam practice
These questions are written in the style of common school and international primary assessments. Try them on your own, without looking back. Then check your answers in the marking guide. The marks are shown in brackets.
- Say how buying and selling work. [3 marks]
- Work out change for paying 10 for a 6 item. [2 marks]
- Name two polite words for shopping. [2 marks]
- Say how to stay safe when shopping. [3 marks]
Total: 10 marks.
Marking guide and model answers
- Seller [1]; buyer [1]; price [1]
- Subtract [1]; answer 4 [1]
- Two [2]
- Adult [1]; real money [1]; not alone [1]
Score guide: 9 to 10 = secure. 6 to 8 = nearly there, revise the parts you missed. Under 6 = work through the lesson again with a grown-up.
Printable worksheet
- What is buying?
- What is selling?
- What is change?
- What is a receipt?
- How to speak?
- Why check change?
- Why be honest?
- Why ask an adult?
- Act a purchase.
- Count change.
Homework
Make a shop with play money and prices.
Answer key and marking scheme
| Question | Expected response | Marks |
|---|---|---|
| 1. What is buying? | Paying for something. | 1 |
| 2. What is selling? | Giving goods for money. | 1 |
| 3. What is change? | Money given back. | 1 |
| 4. What is a receipt? | Shows what you bought. | 1 |
| 5. How to speak? | Politely. | 1 |
| 6. Why check change? | Avoid mistakes. | 1 |
| 7. Why be honest? | Trust. | 1 |
| 8. Why ask an adult? | Safety. | 1 |
| 9. Act a purchase. | Act. | 1 |
| 10. Count change. | Change. | 1 |
| Total | 10 |
Independent practice answers. Level 1: 1 Paying for something.; 2 Giving goods for money.; 3 Money given back.; 4 Shows what you bought.; 5 Politely.. Level 2: 1 Avoid mistakes.; 2 Trust.; 3 Safety.. Level 3: 1 Act.; 2 Change.; 3 Words..
Quiz answers: 1 B, 2 C, 3 A, 4 B, 5 C, 6 A, 7 B, 8 C, 9 A, 10 B, 11 C, 12 A, Challenge 1 B, Challenge 2 C.
Mastery and remediation
| Objective | Bronze (Developing) | Silver (Proficient) | Gold (Advanced) |
|---|---|---|---|
| O1 Say how buying works | 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 Say how selling works | 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 Act out a purchase | 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 Give change | 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 |
Courseversity badge thresholds (overall quiz score): Gold = 90–100%; Silver = 80–89.9%; Bronze = 70–79.9%. A badge is never a full record of progress.
If a learner struggles
- Find the misconception: “Sellers may cheat.” They must be honest.
- Explain another way: use real objects, pictures or actions first, then words.
- Show a simpler example: Make a shop sign.
- 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.
For parents and guardians
In this lesson your child practises buying and selling. Please let your child use play money with you. You do not need to be an expert to help.
- Play shop.
- Check change.
- Shop together safely.
- Ask “how do you know?” after each answer, and listen.
- Praise effort, not only right answers. Mistakes are how we learn.
- Ten to fifteen minutes a day is better than one long session.
Teacher package
1–5. Objectives, prerequisites, materials, preparation, duration
Lesson objectives. Learners will: say how buying works; say how selling works; act out a purchase; give change.
Prerequisite knowledge. Grade 2 ideas: needs and wants, goods and services, producers and consumers.
Materials. Play money, items. Low-resource options: use chalk or charcoal on a board or wall, drawings in the sand, and objects from the classroom instead of printed materials.
Preparation. Prepare a class shop.
Suggested duration. 45–60 minutes. It can be split into two shorter sessions.
6–9. Teaching procedure, explanation notes, guided and independent activities
Introduction (5 min). Tell the corner shop story.
Explanation (10 min). Teach buying and selling.
Guided activity (10 min). Class shop.
Independent activity (10 min). Discuss.
Assessment and reflection (5 min). Ask each learner to say one thing they learned and how they know it.
Key questions. How do we buy and sell honestly?
Teacher explanation notes. Start with a picture, story, map or local example. Then talk about what was seen, then draw and write. Always ask “how do you know?” and invite more than one view. Treat every family, culture and community with respect, and never ask learners to share private information.
10–12. Differentiation, formative assessment, common misconceptions
Support. Use pictures, maps, real objects and short sentences, and let learners work with a partner. Let learners point, show, act or draw instead of writing. Extension. Ask learners to find a new example from their own community and explain how they know.
Formative assessment. Listen to learners read and explain, ask “how do you know?”, and check the independent work.
Misconceptions. “Sellers may cheat.” They must be honest.
13–15. Assessment questions, answer keys, marking scheme
Use the quiz, the 10-mark exam practice and the worksheet on this page. All answers and marking guides are in the answer sections above. Re-check every answer before use.
16–19. Remediation, enrichment, homework, teacher reflection
Remediation. Make a shop sign. Enrichment. Find one new example near your home or school, draw or write about it and explain it to someone. Homework. See above.
Teacher reflection. After teaching, record: which ideas learners understood; which misconceptions occurred; which activities worked; which learners need more practice; and what to improve next time.
Sources and standards
This lesson is based on the sources below, and no official endorsement is claimed. Reference starting points: NCSS standards and C3 Framework, Cambridge Primary Humanities and the IB Primary Years Programme. Where a standard code is named, it points to the official framework.
Research used to shape this lesson. Courseversity Social Studies curriculum, Grade 2 Unit 7, topic 3; NCSS C3 Framework, economic decision making and exchange; Cambridge Primary Humanities, people and work; IB Primary Years Programme, how we organise ourselves. These sources informed the lesson.