Glossary
Study Science Glossary
Key terms and concepts behind spaced repetition, retrieval practice, and the science of effective learning.
Active Recall
A learning strategy where you actively retrieve information from memory rather than passively reviewing notes or textbooks.
Coverage Tracking
A method of mapping which topics in a syllabus or course have been studied, reviewed, and retained, ensuring no material is left behind before an exam.
Desirable Difficulty
A concept from Robert Bjork's research showing that introducing controlled challenges during learning — such as spacing, interleaving, and testing — leads to stronger long-term retention.
Forgetting Curve
A model first described by Hermann Ebbinghaus in 1885 showing that memory retention decays exponentially over time unless information is actively reviewed.
FSRS (Free Spaced Repetition Scheduler)
An open-source, modern spaced repetition algorithm that uses a mathematical model of memory to schedule reviews based on individual card difficulty and learner performance.
Interleaving
A study strategy where you mix different topics or problem types within a single session, rather than focusing on one subject at a time.
Retrieval Practice
The act of recalling previously learned information from memory, which research shows is one of the most effective strategies for strengthening long-term retention.
Spaced Repetition
A learning technique that schedules reviews of material at increasing intervals over time, leveraging the spacing effect to maximise long-term memory retention.