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Turn your math notes into flashcard sets with AI

Upload a PDF, slides, notes or a photo of a worksheet and get flashcards that match your course, then review them with spaced repetition.

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Drop files here or browsePDF, DOCX, PPTX, text or photos of your notes · several files with Plus

Free · First set needs no signup · Creates flashcards in seconds

Why custom sets beat printable ones

Most ready-made math flashcard sets cover topics in a fixed order that rarely matches your course, so you end up memorizing terms your teacher never used.

Match cards to your syllabus instead of a generic topic list
Include notation such as ∪, ∩ and ⊆ exactly as your course uses them
Review with spaced repetition so harder terms return more often
Start with the free plan, which includes 3 generations per month

Example set theory flashcards for math

What is the empty set?The set with no elements, written ∅ or {}.

What is the union of sets A and B?All elements that are in A, in B, or in both, written A ∪ B.

What is the intersection of sets A and B?The elements that belong to both A and B, written A ∩ B.

When is A a subset of B?When every element of A is also an element of B, written A ⊆ B.

What is the cardinality of a set A?The number of elements in A, written |A|.

Generate the full set

Built from your material

Flashcards come from the exact chapter, lecture or handout you upload, so the terms and notation match your class.

Spaced repetition

Cards you miss come back sooner, and cards you know fade into longer intervals, so review time goes to what you actually forget.

Works with photos

Snap a page from your textbook or whiteboard and text recognition pulls the content in for card creation.

How it works

Upload your material

Add a PDF, DOCX, PPTX, plain text notes or images of pages.

Generate your set

DeckOwl builds flashcards from the content, and you can also create quizzes and mind maps from the same source.

Study on a schedule

Review in the browser each day and let spaced repetition bring back the cards you are most likely to forget.

Making your own set from your notes keeps the definitions, symbols and examples aligned with the class you are taking. Start with one chapter, check that the cards reflect what was covered, and add more as the term goes on.

Because each set comes from your own material, you can revisit the same topic from a lecture, a worksheet or a textbook section and see it in several forms.

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Frequently asked questions

How do I study set theory with flashcards?

Make one card per term, such as union, intersection or subset, and write the symbol and a plain-language meaning on the back. Review a small batch daily and mix in older cards so earlier topics stay fresh.

What should a set theory flashcard include?

Each card should have one idea, a worked example if the concept is abstract, and the notation the course uses. Cards like "What is A ∩ B?" work better than long paragraphs.

Can I export math flashcards to Anki?

Yes, Anki export is available on the Plus plan, along with PDF, DOCX and CSV export. The free plan lets you study in the browser but does not include exports.

Is there a free plan to try it?

Yes, the free plan includes 3 generations per month and browser study, and you do not need a credit card to start.

Generate free flashcards

Keep exploring the topic

Review the main ideas visually or practice recalling them.