CogniGuide

Main Idea Map Examples for Reading and Study

See how a main idea branches into supporting details, evidence and conclusions. Then create your own map from a reading passage, PDF or notes.

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CogniGuide at a glance

What you get: Interactive mind maps of the main ideas and how they connect. Free: overview maps (detailed maps on your first 3 creations). Plus: detailed maps with supporting concepts.
Exports: Your first PDF or PNG export is free; Plus exports anytime.
Price: Free plan: 5 creations a week, up to 3 a day. Plus: $9.99/month or $99.90/year (USD; local prices at checkout).
Sign-up: A free account is required before you create anything (Google or email). No credit card.
What you can upload: PDF, Word (.docx), PowerPoint (.pptx), plain text or Markdown, and images (PNG, JPG, WebP, GIF), or type a topic. One file per creation on the free plan; several at once on Plus.

How it compares: vs Knowt · vs Quizlet · vs NotebookLM · vs Mapify

Build a Main Idea Map From Your Reading

Turn any passage or set of notes into a clear map of the central idea and how it is supported.

Start from your own text

Upload a PDF, Word file, slides or plain text, and the AI finds the central idea and its supporting points.

Clear branches for details

Each main point sits on its own branch with the examples, evidence and reasons that support it.

Quiz yourself from the map

Turn the finished map into a quiz, or make flashcards from the same notes to check understanding.

How to Make a Main Idea Map

Three steps from a reading passage to a map you can study and revise.

1
Add your reading
Upload a file or paste the passage, or type the topic you are studying.
2
AI builds the map
The central idea goes in the middle, with supporting details on expandable branches.
3
Study, expand and quiz
Expand weak branches, edit wording, export a PNG or PDF, or turn the map into a quiz.

Main Idea Map Examples and How to Use Them

A main idea map is a graphic organizer that places the central idea of a text in the middle and connects it to the details that support it. A typical example has the main idea at the top, then branches for the key points, with evidence and examples attached to each point. This structure helps readers separate the author's central claim from minor details.

Central idea: the single claim the whole text supports
Key points: the major arguments or sections
Supporting details: facts, quotes and examples
Conclusion: what the author wants readers to take away

Use a finished map to review before a test or to summarize a chapter. To map your own reading, CogniGuide can build a personalized main idea map from your notes or file.

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Main Idea Map Questions Answered

Common questions about main idea maps and how to build one.

What is the difference between a main idea and a topic?

The topic is what the text is about, often a single word or phrase. The main idea is the complete point the author makes about that topic, usually stated as a full sentence.

How many supporting details should a main idea map have?

Most maps use three to five main branches, each with a few details. Enough to show the support clearly, but not so many that the central idea gets lost.

Which files can I use to create a main idea map?

You can upload PDF, Word (DOCX), PowerPoint (PPTX), text or Markdown files, or images, or simply type a topic.

Is it free to make a main idea map with CogniGuide?

Yes. The free plan includes 5 creations a week with no payment needed. You can also turn your map into a quiz.