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Turn class notes and PDFs into flashcards you can review every day

Upload a PDF, slides, notes, or a photo of a page. DeckOwl makes flashcards with spaced repetition, so you review what you are about to forget.

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What to look for in a high school flashcard app

Five classes, three exams, and a stack of slides make it hard to find time to study. The best flashcard app for high school students should take your own material and turn it into cards quickly, so study time goes to recall instead of typing.

  • Accepts the files your teachers actually send: PDF, DOCX, PPTX, and notes.
  • Spaced repetition so cards return on a schedule instead of all at once.
  • Quick quizzes with explanations to test understanding, not just memory.
  • A free starting point, with a student discount on paid plans using a school email.
Example high school biology flashcards
What organelle is the site of cellular respiration?The mitochondrion, which produces most of the cell's ATP.
What is the function of ribosomes?They build proteins by translating mRNA into a chain of amino acids.
How do mitosis and meiosis differ?Mitosis produces two identical diploid cells; meiosis produces haploid cells with different combinations of genes.
What is the role of chlorophyll?It absorbs light energy, mainly red and blue wavelengths, to drive photosynthesis.
What is osmosis?The movement of water across a semipermeable membrane toward the side with higher solute concentration.
Generate the full set

Works with what you already have

Upload PDFs, DOCX, PPTX, plain-text notes, or photos of pages. Text is read from images too.

Spaced repetition built in

Cards come back at the right time, so review stays short and focused across the school week.

Quizzes and mind maps too

Check yourself with multiple choice, true or false, and short answer questions, or map out a unit visually.

How it works

Upload your material

Add a PDF, slides, notes, or an image of a worksheet.

Generate your flashcards

DeckOwl creates cards from your own content in a few moments.

Study on a schedule

Review in the browser on the free plan, and export to PDF, DOCX, Anki, or CSV on Plus.

Look for spaced repetition, which shows each card again just before you would forget it. Short sessions spread over several days tend to work better than one long cram night, and a good app keeps that schedule for you.

Check export options too. If you want to move cards into Anki or print a set for a study group, confirm the plan includes that before you commit.

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Frequently asked questions

How many flashcards should a high school student make per class?

There is no fixed number. Aim for one card per key term, date, or concept in a unit, and split very long lists into smaller decks of about 20 to 30 cards.

How often should I review flashcards before a test?

Short sessions spread over several days work better than one long session the night before. Spaced repetition does this scheduling for you.

Does DeckOwl cost money?

The free plan includes 3 generations per month and studying in the browser. Plus is $39 per year or $7.99 per month, and students with a school email get 40% off.

Can I export my flashcards to Anki?

Yes, on the Plus plan, which also includes PDF, DOCX, and CSV export. No credit card is needed to start.

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Keep exploring the topic

Review the main ideas visually or practice recalling them.