Learning Science
How ELO ratings, spaced repetition, and the testing effect power better learning. Research-backed strategies from LearnClash.
Most learning apps skip the research. LearnClash builds on four decades of cognitive science: the testing effect (Roediger & Karpicke 2006) shows active recall beats re-reading by 50%, spaced repetition (Ebbinghaus 1885; FSRS 2023) multiplies long-term retention, and competitive skill-matching through ELO (Elo 1960) keeps learners in their flow state. These articles explain how each mechanism works and how LearnClash combines them into a single 3-minute-a-day routine.
![The LearnClash SRS Retention Curve: 72% at 7 Days [2026]](/_astro/learnclash-srs-retention-curve.CiY7Rn0o_jMB7.webp)
The LearnClash SRS Retention Curve: 72% at 7 Days [2026]
LearnClash's 3-stage SRS retention curve, mapped: 72% pass at 7 days, 81% at 90, then mastery exits the pool. April 2026 data.
![LearnClash by the Numbers [2026]: ELO, SRS & Data](/_astro/learnclash-statistics.DBAHiLzL_Z45bnF.webp)
LearnClash by the Numbers [2026]: ELO, SRS & Data
LearnClash statistics: ELO distribution, 3-stage Mems SRS retention, tier progression, accuracy gaps, and session data from April 2026.
![How to Memorize Faster: 7 Methods Ranked by Research [2026]](/_astro/how-to-memorize-faster.BgtYG3jg_29JBtb.webp)
How to Memorize Faster: 7 Methods Ranked by Research [2026]
How to memorize faster: 7 methods ranked by 2025-2026 research. Effect sizes, trade-offs, and a 3-stage system that actually sticks.
![Does Quizlet Have Spaced Repetition? [Tested 2026]](/_astro/does-quizlet-have-spaced-repetition.P8zJ9jJ4_1np9pr.webp)
Does Quizlet Have Spaced Repetition? [Tested 2026]
Does Quizlet have spaced repetition? Yes, but free Learn caps at 5 rounds per set. See Plus, Anki FSRS-6, and LearnClash.
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![How to Study Effectively [9 Methods Ranked]](/_astro/how-to-study-effectively.C5dbZQXI_29MUbc.webp)
How to Study Effectively [9 Methods Ranked]
How to study effectively with 9 ranked methods. See why testing and spacing beat rereading, plus a 3-minute LearnClash routine.
![How to Memorize Fast: 9 Science-Backed Methods [2026]](/_astro/how-to-memorize-fast.DOB27C30_ET7Bc.webp)
How to Memorize Fast: 9 Science-Backed Methods [2026]
How to memorize fast: 9 science-backed methods ranked by encoding speed and 24-hour recall. Spaced retrieval beats rereading 2x. Tested.
![How to Remember What You Learn [Science-Backed]](/_astro/how-to-remember-what-you-learn.BAtsstjd_16NPj.webp)
How to Remember What You Learn [Science-Backed]
How to remember what you learn: 7 science-backed techniques ranked by the largest learning research review ever published.
![Spaced Repetition: Never Forget What You Learn [2026]](/_astro/spaced-repetition.DbuZp2Gw_1YznIT.webp)
Spaced Repetition: Never Forget What You Learn [2026]
Spaced repetition explained with the science, exact intervals, and how LearnClash builds it into competitive quiz duels.
![Competitive Learning: Why Quiz Duels Work [2026]](/_astro/competitive-learning.AKMxrfDB_evJU2.webp)
Competitive Learning: Why Quiz Duels Work [2026]
Competitive learning has zero net effect on memory, unless designed right. ELO matching, retrieval practice, and flow make it work.
![The Testing Effect: Why Quizzes Beat Rereading [2026]](/_astro/testing-effect.CBf1q-j__ZNX5uf.webp)
The Testing Effect: Why Quizzes Beat Rereading [2026]
The testing effect proves quizzing builds stronger memory than rereading. See how quiz duels and spaced repetition apply it.
![ELO Rating System Explained [Complete 2026 Guide]](/_astro/elo-rating-system.CnqKYH4X_ZKoNOC.webp)
ELO Rating System Explained [Complete 2026 Guide]
The ELO rating system ranks players by skill using win probability math. See how LearnClash quiz duels use it with 8 tiers, K-factors, and RD.