Interleaved Study Scheduler
Mix your subjects in a rotation for 40–60% better retention than blocked practice.
Research: Kornell & Bjork (2008); Rohrer & Taylor (2007)
Subjects to interleave (2–6)
15–25 minutes is optimal — enough for meaningful work, short enough to require switching.
Why interleaving works
Blocked practice (doing all of one thing before moving to the next) feels more productive but produces worse long-term retention. Switching between subjects forces your brain to retrieve the right strategy for each problem type, which strengthens memory encoding. Kornell & Bjork (2008) found interleaving produced significantly better performance on delayed tests — even though students rated blocked practice as more effective.
Learn why blocked practice fails →Frequently asked questions
What is interleaved studying?
Interleaved study mixes different subjects or problem types within a single session rather than blocking all practice on one topic before moving to the next. Research by Kornell and Bjork (2008) found interleaved practice produced 40–60% better performance on delayed tests compared to blocked practice — despite feeling harder during the session itself.
How does the scheduler generate rotations?
Enter 2–5 subjects, set your session length, and the scheduler creates an optimised rotation. Each block is the same length, subjects alternate so no two consecutive blocks cover the same topic, and the order is shuffled within each set to maintain variety across sessions.
Which subjects should I interleave?
Interleave subjects that require discriminative retrieval — maths problem types, science units with shared concepts, vocabulary in a language. Sequential subjects with prerequisite knowledge (e.g. statistics before calculus) should be studied in order first, then interleaved once the prerequisites are solid.
Why does blocked practice feel more effective even though it isn't?
Blocked practice creates an illusion of fluency — you feel like you're learning more because recall gets easier as you practice the same topic repeatedly. Interleaving makes retrieval harder, which feels like struggling, but that difficulty is what drives deeper encoding. Rohrer and Taylor (2007) found students systematically preferred blocked practice while performing significantly worse on delayed tests.