Spaced Repetition for Hebrew: Why FSRS Beats Anki for Language Learning

If you've ever used Anki for Hebrew flashcards, you know the feeling: 200 reviews due, half of them are words you've known for months, and the new cards pile up faster than you can learn them. You start dreading your daily review. Then you skip a day. Then a week. Then the deck has 847 overdue cards and you abandon it entirely.

Sound familiar?

The problem isn't your discipline. It's the algorithm.

What Is Spaced Repetition?

Spaced repetition is a study technique based on the "forgetting curve" — the scientific finding that you forget newly learned information at a predictable rate, and that reviewing information at optimal intervals dramatically improves long-term retention.

Instead of reviewing everything every day, a spaced repetition system (SRS) shows you cards right before you're predicted to forget them. Easy cards get longer intervals (days, weeks, months). Hard cards come back sooner.

For language learning, this is transformative. You can maintain a vocabulary of thousands of words with just 10-20 minutes of daily review — if the algorithm is good.

SM-2: The Algorithm Behind Anki

Anki uses SM-2 (SuperMemo algorithm 2), designed in 1987 by Piotr Wozniak. It was groundbreaking for its time. Here's how it works:

• Each card has an "ease factor" (how easy you find it)
• After each review, the interval is multiplied by the ease factor
• If you rate a card "Again" (forgot it), the ease factor drops and the card resets

The problem: ease factor death spiral. If you struggle with a card a few times, its ease factor drops below 2.0 — and it starts appearing every 2-3 days forever, even if you've eventually learned it. This creates a mountain of "leeches" that dominate your daily reviews.

FSRS: The Next Generation

FSRS (Free Spaced Repetition Scheduler), developed by Jarrett Ye, takes a fundamentally different approach. Instead of a single "ease factor," it models your memory with three components:

1. Stability — how long a memory will last before you forget it
2. Difficulty — how inherently hard the card is for you
3. Retrievability — the probability that you can recall the card right now

FSRS uses machine learning to build a personalized model of your memory. It analyzes your review history and calculates optimal intervals for each card individually.

The results are significant:

• ~30% fewer reviews for the same retention rate
• Better handling of hard cards — no more ease factor death spiral
• Personalized parameters — the algorithm adapts to how your memory works, not an average

Why This Matters for Hebrew

Hebrew has specific characteristics that make algorithm choice particularly important:

Root families. When you learn the root כ-ת-ב (k-t-v, "write"), you should learn katav (he wrote), kotev (writing), michtav (letter), and ktiva (writing, noun) together. But they're different cards with different difficulty levels. SM-2 treats them independently; FSRS recognizes the relationship.

Binyanim patterns. The verb lishtol (to plant, Pa'al) is easy. The verb lehishtatel (to be transplanted, Hitpa'el) is harder. FSRS handles this gradient naturally.

Script complexity. For non-native readers, recognizing Hebrew letters adds cognitive load on top of vocabulary recall. FSRS accounts for this extra difficulty in its model.

Tutor-Curated vs. Generic Decks

Algorithm aside, there's an even bigger factor in flashcard effectiveness: which cards you study.

Most Anki users download shared decks — "Top 1000 Hebrew Words" or "Biblical Hebrew Vocabulary." These decks are: Generic (not relevant to your specific needs); Context-free (isolated words without usage examples); Unmaintained (errors, missing audio, outdated translations).

At The Jerusalem Bridge, your flashcard deck is curated by your tutor — me — after every lesson. The cards contain: Words from our actual conversation; Hebrew and transliteration with native audio; Context sentences from the texts we read; Root connections mapped visually.

You're not studying random vocabulary. You're studying your vocabulary — the words you need, in the order you need them.

The Combination That Works

The best learning happens when smart technology serves a human relationship:

1. Live lessons where a tutor calibrates to your level
2. FSRS-powered flashcards curated from those lessons
3. Root exploration that connects new words to patterns you already know
4. Reading practice at your current level with toggleable nikud

This is exactly how The Jerusalem Bridge works. No generic decks. No ease factor death spirals. Just efficient, personalized retention.

Try It

Start your free account and see the difference that FSRS + tutor curation makes. Your first lesson creates your first personalized deck. Ten days, no credit card.

Your memory is better than you think. The algorithm was just holding you back.