Maths hiding in pocket money: interest stories

Quick answer

Maths hiding in pocket money: interest stories shows how money can grow over time, like a plant growing from a seed. If you save your pocket money, it can grow bigger, just like how a seed grows into a tree when you give it time, water, and care.

Learning outcome

By the end of this page, you will understand how saving money can make it grow, and you will be able to imagine how money can increase over time, like a small seed becoming a big tree.

• You can explain that saving money can make it grow over time
• You can picture how money can be like a plant growing
• You can think about how small amounts can grow into bigger amounts
• You can imagine saving your pocket money for something special

Why this matters

Learning about how money can grow helps you understand the value of saving. It's like watching your toys grow and change over time. When you save your pocket money, it's like planting a seed in your piggy bank. Over time, that seed can grow into something much bigger. This idea helps you think about your future and what you might want to save for.

How it works

When you save money, it can grow over time. This is called interest. Interest is like a gift that your money gets from the bank. The longer you save, the more interest your money can earn. Here’s how it works:

1. You put money in a bank or savings account
2. The bank uses your money to help other people
3. The bank gives a small gift (interest) back to you for letting them use your money
4. Over time, that gift adds up and makes your money grow

Think of it like this: if you plant a seed in the ground and take care of it, it will grow. If you save your money and let it grow, it will also grow. The more time it has, the more it grows!

Examples you can see

Imagine you have £1 in your piggy bank. If you leave it there for one year, the bank might give you a small gift of 5p. That means you now have £1.05. If you leave it there for another year, you might get another 5p. Now you have £1.10. This is how money can grow over time.

Let’s look at this in a table:

Notice how the money grows a little bit each year. This is how interest works – it’s a small gift that makes your money grow over time.

Try it as a mini adventure

Let’s go on a money-growing adventure!

Imagine you have £5 in your pocket money savings. You decide to save it for 3 years. Each year, your bank gives you 10p interest. How much money will you have at the end of 3 years?

Year 1: You start with £5.00. You get 10p interest. Now you have £5.10.

Year 2: You start with £5.10. You get 10p interest. Now you have £5.20.

Year 3: You start with £5.20. You get 10p interest. Now you have £5.30.

Great job! You saved £5 and now you have £5.30. That’s a small increase, but it shows how money can grow over time.

Common mistakes

• Mistake: Thinking that money grows a lot every year.
• Why it happens: Children often imagine money growing quickly, like a plant growing overnight.
• Fix: Remind them that interest is a small gift, not a big surprise.

• Mistake: Believing that interest only works with large amounts.
• Why it happens: Children think they need a lot of money to start saving.
• Fix: Explain that even small amounts can grow over time.

• Mistake: Thinking that interest is the same as getting more pocket money.
• Why it happens: Children confuse interest with extra pocket money from parents.
• Fix: Clarify that interest is a gift from the bank, not from parents.

Parent and carer guide

As a parent or carer, you can help your child understand how money can grow by:

• Using a piggy bank or savings box to show how money can grow over time
• Having a simple conversation about how saving is like planting a seed
• Encouraging your child to think about what they want to save for
• Not worrying if they don’t understand all the details – focus on the idea of growth
• Practising with small amounts to show how interest works

Remember, this is not financial advice. The goal is to help your child understand that saving money can make it grow, even if it’s just a little bit each year.

Practice questions

1. Imagine you save £2 in a bank. After one year, you get 5p interest. How much money do you have now?
2. You have £3 in your savings. After one year, you get 10p interest. How much do you have now?
3. You save £10 and get 5p interest each year. How much do you have after 2 years?
4. You have £5 and get 10p interest each year. How much do you have after 3 years?
5. You save £15 and get 5p interest each year. How much do you have after 4 years?

Answers:

1. £2.05
2. £3.10
3. £10.10
4. £5.30
5. £15.20

FAQ

What is interest?

Interest is a small gift that banks give you for letting them use your money. It helps your money grow over time.

Can I earn interest on small amounts?

Yes, even small amounts can earn interest. The more money you save, the more interest you can earn.

How does interest work?

When you save money, the bank uses it to help other people. In return, they give you a small gift (interest) to thank you.

Does interest make a lot of money?

No, interest is usually a small amount. It’s like a small gift that helps your money grow slowly over time.

Why should I save money?

When you save money, it can grow over time. It helps you save up for something special you want to buy later.