Students often equate studying with time spent: hours of rereading notes or copying from textbooks. Research in cognitive psychology suggests that how one studies matters far more than how long. This article summarises five well-supported methods and how to apply them, whether you are preparing for examinations or memorising the Qur'an.
1. Retrieval practice
Recalling information from memory strengthens it more than reviewing it again. In a widely cited experiment, Roediger and Karpicke (2006) found that students who took practice tests on a passage remembered substantially more a week later than students who reread it, even though rereading felt more effective at the time. Practical forms include answering past questions, covering notes and writing down what you remember, and reciting a portion without looking.
2. Spacing
Reviews spread out over time produce stronger long-term retention than the same reviews massed together (Cepeda et al., 2006). A simple schedule revisits a topic the next day, a few days later, a week later and then a few weeks later. The slight difficulty of recalling material that has begun to fade is part of what makes spacing effective.
3. Interleaving
Mixing different types of problems in a single session, rather than practising one type in a block, improves the ability to choose the right method. Rohrer and Taylor (2007) found that students who practised mathematics problems interleaved performed much better on a later test than those who practised them in blocks, although interleaved practice felt harder during the session.
4. Elaboration and self-explanation
Explaining why a fact is true, how it connects to what you already know, or how a solution works deepens understanding. Asking "why?" and "how?" at each step, and explaining a topic aloud as if teaching it, exposes gaps that passive review hides. Dunlosky and colleagues (2013) rated elaborative interrogation and self-explanation as moderately useful.
5. Sleep
Memory consolidation continues during sleep. Studies reviewed by Stickgold (2005) show that sleep after learning improves the retention of both facts and skills. Late-night cramming that cuts sleep therefore works against its own purpose.
Why the effective methods feel harder
Several of these methods share a feature: they make study feel more difficult while it is happening. The psychologist Robert Bjork called these "desirable difficulties" (1994). Rereading feels fluent, so it feels like learning; recalling from memory feels effortful, so it feels like failing. In fact the effort of retrieval is what strengthens memory. Students who understand this are more willing to choose the harder, more effective method.
Methods that feel productive but are less effective
- Rereading notes many times, which builds familiarity but not reliable recall.
- Highlighting, which rarely improves later performance on its own.
- Studying one topic for hours at a time, which produces strong short-term performance that fades quickly.
Applying the methods to Qur'an memorisation
- Retrieval: recite the new portion from memory several times rather than reading it repeatedly from the muṣḥaf.
- Spacing: revisit a new portion the next day, after a few days and after a week, before it joins the long cycle.
- Interleaving: in revision, mix portions from different parts of the Qur'an, which helps with similar verses.
- Elaboration: learn the meaning and context of what you memorise.
- Sleep: revise the day's portion before sleep and recite it again in the morning.
A link with classical practice
Many of these findings echo long-standing practice in Islamic education. Qur'an teachers have always required students to recite from memory to a teacher, to revisit earlier portions on a rotating schedule and to keep their recitation alive in prayer. In his manual for students, Taʿlīm al-Mutaʿallim, al-Zarnūjī advised repeating each lesson many times and returning to earlier lessons repeatedly. Modern research gives a precise account of why these methods work.
Putting it together
- Begin each session by recalling, without notes, what you studied last time.
- Practise with questions, and check your answers immediately.
- Mix topics and question types within a session.
- Schedule reviews of each topic at increasing intervals.
- Protect a full night's sleep, especially before examinations.
Sources and further reading
- Roediger, H. L., & Karpicke, J. D. (2006). Test-enhanced learning: Taking memory tests improves long-term retention. Psychological Science, 17(3), 249–255.
- Cepeda, N. J., et al. (2006). Distributed practice in verbal recall tasks: A review and quantitative synthesis. Psychological Bulletin, 132(3), 354–380.
- Rohrer, D., & Taylor, K. (2007). The shuffling of mathematics problems improves learning. Instructional Science, 35, 481–498.
- Dunlosky, J., et al. (2013). Improving students' learning with effective learning techniques. Psychological Science in the Public Interest, 14(1), 4–58.
- Stickgold, R. (2005). Sleep-dependent memory consolidation. Nature, 437, 1272–1278.
- al-Zarnūjī, Taʿlīm al-Mutaʿallim Ṭarīq al-Taʿallum.
- Bjork, R. A. (1994). Memory and metamemory considerations in the training of human beings. In J. Metcalfe & A. Shimamura (Eds.), Metacognition: Knowing about Knowing (pp. 185–205). Cambridge, MA: MIT Press.