Free knowledge for anyone who is curious

What do you want to understand today?

Exploration here means following curiosity with a map: start with a question, get a clear answer, then choose the next idea worth understanding.

Choose something that interests you. Explore questions, discover simple answers, and keep learning.

10 questions at a time Simple explanations Test your knowledge
ExplainItSimply Explore illustration
Start with what interests you

Choose a learning area

These are the same six interests already used across ExplainItSimply. Pick one and we will bring you ten questions to explore.

How to use ExplainItSimply to learn something properly

ExplainItSimply is designed to help you move from a question to an understanding you can explain in your own words. You do not need to read every page or already know the technical terms. Start with something you genuinely want to understand, follow the explanation, test the idea, and choose what to investigate next.

Step 1: Start with a real question

A useful learning question is specific enough to explore. Instead of “I want to learn technology,” try “What happens when I open a website?” Instead of “I want to understand space,” try “Why does the Moon appear to change shape?” A precise question gives you a place to begin and makes it easier to recognise when you have learned something.

If you are not sure what to ask, choose one of the learning areas below and read its introductory guide. You can begin with a simple explanation and follow links to more detailed topics when you are ready.

  • Artificial intelligence: understand what AI does, how models learn patterns, what their limits are, and how to use tools responsibly.
  • Software and programming: learn how applications are built, how APIs exchange information, what code does, and how developers investigate bugs.
  • Space and the universe: explore Earth, the Moon, planets, gravity, orbits, and how scientists learn about distant objects.
  • School and learning: explore study methods, learning difficulties, and ways to practise a skill rather than only reread information.
  • Skills and future: connect interests and strengths to practical skills, training choices, and career research.
  • Money and life: learn about budgets, credit, saving, investing, and everyday decisions. These guides provide general education, not personal financial advice.

Step 2: Read actively, not just quickly

While reading, pause after each main idea and ask yourself three questions: What does this mean? Why does it work this way? What is an example I could explain to someone else? If the page uses a diagram, trace what each part represents and how the parts connect. A diagram is useful when it makes a relationship clearer, not simply because it decorates the page.

Try to explain the concept without copying the wording. If you cannot, return to the part that feels unclear, find a simpler example, or write down the exact question you still have. Confusion is useful information: it shows which step needs another explanation.

Step 3: Connect the explanation to a real situation

New knowledge becomes easier to remember when you use it. For programming, change a small value in a code example and predict what will happen before running it. For money, use your own fictional numbers to compare a weekly cost with a monthly cost. For space, use a ball and a torch to model how sunlight reaches Earth. For digital literacy, take a claim you see online and look for its original source, publication date, evidence, and possible incentive.

Use fictional or non-sensitive information in online tools. Do not post passwords, banking details, private school records, confidential work information, or another person's personal information into a learning tool unless you have clear permission and know how the service handles it.

Step 4: Check what you have understood

Questions and quizzes can reveal gaps, but a correct multiple-choice answer does not always prove deep understanding. Explain why your chosen answer is correct and why a tempting alternative is wrong. Then try a different example. If you can apply the idea to a new situation, you are more likely to understand the principle rather than simply remember a phrase.

When an answer depends on facts that can change—such as admission requirements, financial rules, product features, or current scientific findings—follow the source links and check the original source. A page can help you understand a subject, but it should not replace official instructions or qualified advice for decisions with serious consequences.

Step 5: Choose your next learning step

After one page, you can stop with a useful answer or go deeper. If you understand the basic idea, explore how it works. If you understand the process, look at a worked example. If you can complete the example, investigate a limitation or a real-world failure. This progression—from definition, to process, to practice, to limitations—helps avoid collecting disconnected facts without understanding how they fit together.

You can also compare related topics. Learning about AI becomes more useful when you understand data and programming. Learning about credit becomes more useful when you understand budgets and interest. Learning about day and night becomes clearer when you distinguish Earth's rotation from its orbit and axial tilt. Related pages should add a new layer, not simply repeat the same introduction.

Step 6: Use comments and feedback constructively

If a page leaves you with a question, describe the exact point that is unclear and what you have already tried. Specific feedback—such as “I understand the request, but not why the server returns a 404”—is more useful than “I don't get it.” Do not include private information in a public comment. If you spot an error, share the relevant claim and a reliable source so it can be checked.

A simple learning record

After reading, write four short notes:

  1. Question: what did I want to understand?
  2. New idea: what is the most important thing I learned?
  3. Evidence or example: how can I show that the idea makes sense?
  4. Next step: what remains uncertain or what would I like to explore next?

For example: “I wanted to know why a website can fail to load. I learned that the browser, network, name lookup, and server can each be involved. I can test another website and check the error message to narrow down the cause. Next, I want to understand what DNS does.” That is a useful learning outcome because it connects a question to an explanation and a next action.

Learning at your own pace

You do not have to finish a whole category in one sitting. A short, focused session with one concept explained clearly and one example completed can be more valuable than scrolling through many pages. Return to a topic when you have a new question or enough background to understand a deeper explanation.

ExplainItSimply aims to make complex topics easier to approach, while keeping the distinction between a simple explanation and a complete professional treatment. Use linked primary sources for important decisions, practise ideas rather than only memorising them, and keep asking what the evidence shows and where the limits are.

Sources

Sources and further reading

A closer look

Start with one question you can answer afterwards

Instead of opening five unrelated topics, choose one question such as why the Moon changes shape. Read the explanation, attempt its activity and explain the answer without looking.

Work through the distinction

Follow a related link when it fills an identified gap. A useful learning session ends with a clearer explanation or a better question, not simply a longer list of opened tabs.

What is a useful end-of-session check?

Choose an answer to see feedback. You can try again.

Show the answer and explanation

Explain the answer in your own words. Follow a related link when it fills an identified gap. A useful learning session ends with a clearer explanation or a better question, not simply a longer list of opened tabs.