Make addition flashcards within 20 from your own worksheets
Upload a worksheet, a slide, or a photo of class notes, and DeckOwl builds flashcards within 20 that match what your child is learning this week.
Why custom cards beat a printed sheet
Printed sheets give a quick drill, but they cannot tell which sums a child keeps missing. Upload a worksheet or a photo of one and DeckOwl builds addition flashcards within 20 from it, so the practice matches what the class is working on.
- Cards generated from the lesson your child is actually studying
- Spaced repetition that returns missed sums more often
- Photos of worksheets read with text recognition
- Export to PDF or Anki on paid plans
Built from your material
Start with the worksheet or notes your teacher sent home, and the cards follow the same problem types and number ranges.
Spaced repetition
Sums that get missed come back sooner, so practice goes to the facts that need it instead of the ones already known.
Study in the browser
Practice on any device with no app to install. The free plan includes 3 generations per month and no credit card is needed to start.
How it works
Upload your material
Add a PDF, DOCX, slide deck, plain text notes, or a photo of a page. Photos are read with text recognition.
Review the cards
Check the addition flashcards within 20 that DeckOwl creates and edit any that do not match your lesson.
Study with spaced repetition
Work through the deck daily. Cards you miss return sooner, and the ones you know fade into longer gaps.
Addition facts within 20 are easier to recall when a child sees the same pairs in different orders, such as 9 + 6 and 6 + 9. Spaced repetition brings back the pairs that were missed, which builds quick recall over several sessions instead of one long drill.
Paid plans add PDF, DOCX, Anki, and CSV export, so a teacher can print a set or move the deck into another study app. The free plan keeps everything in the browser.
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Frequently asked questions
How do I practice addition facts within 20 at home?
Short daily sessions of 10 to 15 minutes work well for most children. Mix problems in different orders and have the child explain how they got each answer, such as making a ten.
Which strategies help with sums within 20?
Counting on from the larger number, doubles like 7 + 7, and making a ten (9 + 6 becomes 10 + 5) are the strategies most first-grade programs teach. Practice each one with a few cards at a time.
Can I export my addition flashcards?
Yes, PDF, DOCX, Anki, and CSV export are included in the Plus plan at $99.90 per year or $9.99 per month. The free plan lets you study the cards in the browser without exporting.
Do I need a credit card to try DeckOwl?
No. The free plan gives 3 generations per month with no credit card required, and students with a school email get 40% off paid plans.
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