Main Idea Map Graphic Organizer for Reading
See how a main idea map breaks a passage into the central idea, key details and supporting evidence. Then build one from your own text.
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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 Your Main Idea Map Fast
Turn any reading passage into a clear main idea map you can study, edit and expand.
Map from your own text
Upload a PDF, Word file or text and get a main idea map built from the passage.
Clear central idea and details
Each branch separates the main idea from the details and evidence that support it.
Quiz and flashcards next
Turn the finished map into a quiz or flashcards to check your understanding.
How to Make a Main Idea Map
Three steps from a reading passage to a finished graphic organizer.
- 1
Add the passage
Upload a file or paste the text you want to analyze.
- 2
AI builds the map
The AI finds the central idea and sorts the supporting details into branches.
- 3
Review and export
Expand branches, edit wording, then export or quiz yourself on the map.
What a Main Idea Map Graphic Organizer Shows
A main idea map graphic organizer is a visual tool for finding the main idea of a text. The central idea sits in the middle or at the top, and branches show the key details, examples and evidence that support it. Students often use it to sort a passage before writing a summary or answering comprehension questions.
- Central idea: the single claim or topic the whole passage supports
- Key details: the facts, reasons or events that develop the idea
- Examples: specific cases, quotes or data that prove each detail
- Supporting evidence: the sources or passage lines that back up each example
Use the map to check whether each detail really supports the central idea. Then create your own main idea map from notes or a reading passage with CogniGuide.
Explore related topics
Main Idea Map Questions
Common questions about main idea organizers and making your own map.
What is the main idea of a passage?
The main idea is the central point the author wants readers to understand. It is broader than a single fact and is supported by the details throughout the text.
How is a main idea different from a topic?
A topic is what the text is about in a word or phrase. The main idea is the complete point the author makes about that topic, usually stated as a full sentence.
Which files can I use to build a main idea map?
You can upload a PDF, Word (DOCX) or PowerPoint (PPTX) file, a text or Markdown file, or an image. You can also type a topic.
Can I turn my main idea map into a quiz?
Yes. CogniGuide can turn a map into a quiz to test yourself, and the same notes can become flashcards. The free plan includes 5 creations a week.