The Leitner flashcard method uses physical index cards and numbered boxes instead of an app. You review cards daily, moving them forward when correct and back to Box 1 when wrong. No device, subscription, or syncing required.
Why Paper Instead of an App?
Flashcard apps are convenient, but they come with trade-offs: algorithms you can’t inspect, syncing issues, gamification that substitutes for actual learning, and the constant presence of a device. The Leitner flashcard method eliminates all of those. You write the card, you decide the box, you feel the physical weight of what you know and don’t know.
What You Need
Index cards (3×5 or 4×6), three to five boxes or compartments, a pen, and 15 minutes a day. The free 3-Box Schedule tells you which box to review each day.
Writing Cards That Work Without an App
Paper cards require a little more discipline in design because you can’t rely on software to show you the “right” answer. One fact per card is essential. Short answer on the back. Write in your own words — not copied from a textbook. Run every card through the quality checklist before adding it to Box 1.
When Apps Are Better
If you have thousands of cards across many subjects, or need to study on the go from multiple devices, an app like Anki may be more practical. The Leitner method shines for focused study sessions with decks of 50–500 cards. Read the Leitner System guide to decide if it fits your workflow.
Ready to run your whole Leitner system from one sheet?
The Leitner OS Dashboard is a Google Sheet with everything pre-built: a Due Today list, box-by-box counts, a rewrite queue for problem cards, and settings you can adjust in seconds. No app, no subscription, no installation.
- ✓ Know which cards are due today — automatically
- ✓ Spot backlog before it hits you
- ✓ Track which cards need rewriting, not just more repetition
- ✓ No app. No syncing. Just a Google Sheet.
One-time purchase. Make a copy in 30 seconds.