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NextGen · Ages 11–13 · Lesson 5 of 8

Earning Money

Keeping good records helps you see whether an earning idea is worthwhile and whether you delivered what you promised.

What you will learn

  • Connect earning with useful skills and responsibilities.
  • Track money received and costs paid.
  • Distinguish revenue, profit, and time spent.

Why it matters in real life

Keeping good records helps you see whether an earning idea is worthwhile and whether you delivered what you promised.

Start with safety and permission

Age-appropriate earning might include an approved household task, a small craft project, or helping a known neighbor with adult supervision. Not every idea is suitable for every age. Employment rules, hours, permits, and allowed tasks depend on age, location, and the work. Ask a trusted adult before arranging work, spending startup money, or contacting customers.

A useful earning plan names the task, quality standard, price, deadline, and person responsible. Agree on those details before starting. Do not publish your address, school schedule, phone number, or payment credentials to advertise a project. In a lesson, use fictional customers and records.

Revenue is not the amount you keep

Revenue is the money customers pay for sales. Expenses are costs of doing the work. Profit is revenue minus the expenses counted in the example. If Ernie earns $24 selling six small bookmarks at $4 each and spends $9 on materials, the simple profit is $15. The $24 total is not all available for personal spending.

An earnings tracker records the date, task, money received, cost, and amount remaining. A sale promised but not yet paid is different from cash already collected. Keep those columns separate. Refunds, replacement materials, transport, taxes when applicable, and other costs can change the amount kept.

Time is part of the comparison

If the bookmarks took three hours, $15 divided by three is $5 of simple profit per hour. This is a classroom comparison, not a guaranteed wage or a legal minimum-wage calculation. Another idea with lower sales may use less time or fewer materials.

A good earning idea also depends on reliability and ethics. Charge the agreed price, describe the work honestly, handle supplies safely, and tell a grown-up if a customer asks for something outside the plan. Skills such as measuring, communicating, organizing, and solving a problem can become more valuable with practice.

Essential vocabulary

Revenue
Money received from sales before subtracting costs.
Expense
A cost required to carry out the work.
Profit
Revenue minus the expenses counted.
Skill
An ability that helps you complete useful work.
Responsibility
An obligation you agreed to meet.
Cash received
Money actually collected, rather than merely promised.
Profit per hour
A simple comparison of profit divided by time spent.

Step-by-step example

Follow the reasoning

  1. Calculate sales: 6 bookmarks x $4 = $24 revenue.
  2. Count material costs: $9.
  3. Subtract costs: $24 - $9 = $15 simple profit.
  4. Record three hours of work.
  5. Compare $15 / 3 = $5 per hour before other costs or taxes.

Try it yourself

Use only the supplied fictional information or invented practice amounts. Do not enter real account numbers, passwords, pay records, or identifying details.

Track revenue and simple profit

Change the fictional numbers, calculate, and explain what changed.

Your result and calculation assumptions will appear here.

Check your understanding

Choose an answer for immediate, specific feedback. You can retry to learn from the explanation.

1. Eight sales at $3 each with $10 of costs produce what simple profit?

2. A customer promises to pay tomorrow. In a cash tracker, that money is:

3. Before offering work online, a middle-school learner should:

0 of 3 correct in this attempt.

Free practice worksheet

Earnings and Profit Tracker: a two-page printable with practice and model answers. It is useful on its own and does not require a purchase.

Download free PDF →
Optional deeper study · Available on Payhip

Young Entrepreneur Launch Lab

The free mini-business sheet introduces a single idea. Launch Lab develops the full research-to-pitch process with multiple cases, detailed calculations, reusable templates, and complete project support.

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Keep learning with official sources

U.S. educational material checked October 18,2026(New York). Examples are fictional. Rules, rates, account terms, and circumstances can change. This is not personalized financial, legal, tax, or investment advice.

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