Interleaving

Interleaving is the practice of alternating between different subjects, topics, or types of problems during a study session. This stands in contrast to "blocking," where you study one topic exhaustively before moving to the next. While blocking feels more productive because it produces short-term fluency, decades of research show that interleaving leads to substantially better long-term retention and transfer. The effect has been demonstrated across domains from mathematics to medical diagnosis to motor skills.

The reason interleaving works is that it forces your brain to repeatedly reload mental context and discriminate between different types of problems. When you study similar material in blocks, you stop actively deciding which strategy to apply — the context tells you. But in an exam, topics are mixed. Interleaving during study more closely simulates exam conditions, building the discrimination skills you actually need. The cognitive effort of switching between topics also creates a desirable difficulty that strengthens memory encoding.

In Revu, interleaving happens naturally because the review queue draws from all your decks and topics. Cards from different subjects are mixed together based on their scheduling priority, not grouped by topic. This built-in interleaving means every study session trains both recall and discrimination. For exam preparation, this is particularly valuable — you practice not just remembering individual facts, but identifying which knowledge applies to each question.