Your students forget 80% of what you teach.

Within a week. Every week. It's not their fault — it's how memory works. There's a fix, and it's built into every Pakka deck.

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21%
retained after 30 days of re-reading notes
Cepeda et al. (2006)
90%
retained after 30 days with spaced repetition
Murre & Dros (2015), replication
4.3×
more efficient than massed practice
Dunlosky et al. (2013)
The science

The forgetting curve is real, but so is the fix

In 1885, Hermann Ebbinghaus proved memory decays exponentially after learning. Each well-timed review resets the curve at a higher baseline — that's spaced repetition.

Forgetting curve comparison: memory decays without review (red), but stays high with spaced reviews (teal).100%80%60%40%20%0%020min1hr1 day1 week2 weeks30 daysReview 1Review 2Review 3Review 4Time →
No reviewWith spaced reviews (Pakka)

Murre & Dros (2015), replication in PLOS ONE

The evidence

Why spaced repetition works

Four findings on active recall and spaced study, with citations.

Vocab recall, 1 week later

No revision
33%
Revise only
36%
Spaced repetition
80%
Karpicke & Roediger (2008), Science. 64 students, 40 Swahili–English vocab pairs.

Textbook recall, 1 week later

Read 4 times
40%
Read 3, test 1
56%
Spaced repetition
61%
Roediger & Karpicke (2006), Psychological Science. 180 students, prose passages, 1-week free recall.

Recall after 8–30 days

Cramming
33%
Spaced repetition
62%
Cepeda et al. (2006), Psychological Bulletin. Meta-analysis: 6 studies, 492 learners.

Medical content, 6 months later

Revising notes
26%
Spaced repetition
39%
Larsen, Butler & Roediger (2009), Medical Education. RCT, 40 medical residents.
JEE ChemistryNEET BiologyCBSE PhysicsICSE MathematicsHistoryEnglish VocabularyAnatomyGeographyEconomicsComputer ScienceSpoken EnglishUPSC GSJEE ChemistryNEET BiologyCBSE PhysicsICSE MathematicsHistoryEnglish VocabularyAnatomyGeographyEconomicsComputer ScienceSpoken EnglishUPSC GS
"Spaced practice is one of the most robust findings in all of experimental psychology, boosting test performance by 10–30%."
Dunlosky et al. (2013). Psychological Science in the Public Interest.
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See how Pakka cards feel

Tap through real card types — MCQ, True/False, Type Answer, and Plain flashcards. This is exactly what your students see.

Demo Deck1/5
MCQ
What is the powerhouse of the cell?

Select an answer above

Multiple Choice

Students pick from 4 options. Wrong answers auto-rate as Again (card comes back soon). Right answers let the student self-rate recall.

Card 1 of 5
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01

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Five card types. CSV import for bulk. Rich text, images, MCQ, True/False, Type Answer. Minutes, not hours.

02

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03

Our scheduling algorithm handles the rest

Every card is scheduled individually for every student. 10 minutes a day. You see who studied and who didn't.

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