Main Idea Bubble Map for Reading Comprehension
See an example map that separates the main idea from key details, then generate your own from any reading passage, PDF or slide deck.
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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
Upload a passage or type a topic and get a bubble map with the central idea and its supporting details.
Built From Your Own Text
Upload a PDF, Word file, text file or image of the passage and the AI pulls out the main idea and details.
Clear Idea and Detail Levels
The central bubble holds the main idea, with branches for each supporting detail and example.
Quiz and Flashcards Next
Turn the map into a quiz to check understanding, or make flashcards from the same notes.
How to Make a Main Idea Bubble Map
Three steps from a reading passage to a map you can study and share.
- 1
Add Your Passage
Upload the reading as a PDF, Word file, text file or image, or type the topic.
- 2
AI Builds the Map
The AI places the main idea in the center and sorts supporting details around it.
- 3
Study, Expand and Quiz
Expand any bubble, edit the wording, export as PNG or PDF, or turn the map into a quiz.
Main Idea Bubble Map Basics
A main idea bubble map is a graphic organizer that places the central point of a text in the middle and surrounds it with bubbles for supporting details. Students use it to separate the big idea from the evidence that backs it up. It works well for short passages, articles and chapters, and it helps readers check whether each detail actually supports the main claim.
- Central bubble: the main idea, stated in one clear sentence
- Supporting details: facts, reasons or examples that back the idea
- Key vocabulary: terms the passage defines or depends on
- Author purpose: why the text was written, such as inform or persuade
- Summary line: a short restatement of the main idea in your own words
Use the finished map to review a reading before a test or to plan a written summary. CogniGuide can build a personalized main idea bubble map from your own passage in seconds.
Explore related topics
Main Idea Bubble Map Questions
Answers about how the map works and how to build one from your reading.
What is the difference between a main idea and a topic?
The topic is what the text is about, such as volcanoes. The main idea is the point the author makes about that topic, such as volcanoes shaping the land over long periods. A bubble map keeps the main idea in the center and the topic is usually named in a smaller bubble.
How many supporting details should a main idea bubble map have?
Most maps use three to five supporting details. Enough to show the evidence clearly, but few enough that each detail can be read and remembered without clutter.
Which files can I use to make a main idea map with CogniGuide?
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 instead of uploading.
Can I turn my main idea bubble map into a quiz?
Yes. Turn any map into a quiz to test yourself on the main idea and details. The free plan includes 5 creations a week, with no payment needed.