Spaced Practice: A teacher's guide
Spread learning over time to beat the forgetting curve. Evidence-based strategies for building spaced practice into your curriculum and lessons.
What is spaced practice in teaching?
Spaced practice helps learners remember information for longer periods. Rohrer (2009) and Cepeda et al. (2006) showed it works better than cramming. Learners review material with breaks between each session. This method moves information into long-term memory.
Microlearning uses short (5-10 minute) learning sessions. Return to these sessions regularly for best results. This builds better knowledge than one long session (Ebbinghaus, 1885). You can use this for learner revision activities.
For a practical overview of how these ideas apply in lessons, see our guide to working memory in the classroom.
Spaced practice aids learner recall through scheduled review (Cepeda et al., 2008). Learners review material regularly, dodging last-minute cramming (Kang, 2016). This strengthens long-term memory for learners (Dunlosky et al., 2013).
Key Takeaways
- Spaced practice directly counters the natural decay of memory over time. Hermann Ebbinghaus's foundational work on the forgetting curve (Ebbinghaus, 1885) demonstrated that memory strength diminishes rapidly without review, highlighting the necessity of distributed learning. Teachers can effectively combat this by scheduling brief, regular review sessions, ensuring learners revisit material before it is completely forgotten.
- Introducing 'desirable difficulties' through spaced intervals significantly enhances long-term retention. Robert Bjork's research on learning and forgetting (Bjork & Bjork, 1992) posits that making learning slightly harder, such as by allowing some forgetting before retrieval, creates stronger, more durable memory traces. Educators should embrace this by designing revision schedules that strategically challenge learners' recall, moving beyond superficial familiarity.
- Strategic spacing intervals are critical for optimising learning efficiency and long-term recall. Research into the spacing effect indicates that the ideal interval between study sessions depends on the desired retention period, with longer gaps generally yielding better long-term memory (Carpenter et al., 2012). Teachers can practically implement this by utilising tools like the Leitner System or dedicated spaced revision schedulers to manage these intervals systematically for their learners.
- Spaced practice consistently outperforms cramming for building robust, lasting knowledge. Unlike massed practice, which creates transient retrieval strength, distributed practice cultivates deep storage strength by repeatedly reactivating memory traces after periods of forgetting (Bjork & Bjork, 2011). This approach ensures learners develop a resilient understanding of material, making knowledge accessible long after initial learning.
Karpicke and Roediger (2008) showed questioning helps learners recall information. Spaced practice aids learners' long-term memory (Karpicke & Roediger, 2008). This method moves information to a learner's long-term memory storage.
Spaced practice is one of the most effective study strategies, where learners review the learning material over an extended time. This provides time for their minds to make connections between different concepts and ideas so the learners can build upon learning and easily recall the knowledge in future. How does spaced learning work to improve the learning process?
The main purpose of spaced repetition is to give a chance to the learner to (nearly) forget the previous learning before revisiting the same material. It may sound like a bad idea, but forgetting something to remember leads to long-term retention of learning. This is a core principle of the spacing effect.
Forgetting aids later recall for learners. Spaced learning and retrieval practice train the brain (Bjork, 1992). Revisiting content boosts memory (Karpicke & Roediger, 2008). This improves long-term knowledge retention (Ebbinghaus, 1885).
When a person crams in frequent study sessions, all the knowledge is saved in his short-term memory (which he quickly forgets). The use of gaps between study sessions is an effective learning strategy that allows the material to store in the learner's long-term memory instead.
Spaced retrieval helps learners recall facts faster from long-term memory. Learners won't strain to remember the facts during intense learning periods. This aids recall (Karpicke & Blunt, 2011; Roediger & Butler, 2011).
In the first few learning sessions, the learner's mind would be working hard to recall the information. As he revisits the information, it will become easier to recall and build upon.
How do teachers implement spaced practice in the classroom?
Spaced practice involves scheduling reviews with increasing gaps. Start reviewing material one day later, then after three days, then a week, then two weeks. Use retrieval practice, like short quizzes or discussions, in class. (Rohrer, 2008) suggests this helps learners.
Spaced repetition can be practiced in the following four steps:
- Planning: Plan the regular intervals of study sessions;
- Study and review: The information must be studied and reviewed for the first time.
- Recalling: Recall the learned material at the first spacing interval.
- Continue to recall: The learning material must be recalled at adequate spacing intervals.
Curriculum support is key for learners, research shows. Graphic organisers and blocks aid learners in knowledge construction. Remember learner memory limits when planning (Willingham, 2009). Schools now investigate memory encoding (Brown et al., 2014).
Learners grapple with tricky concepts in all subjects. Understanding learning science helps them retain vital facts. The Education Endowment Foundation has many relevant studies. Landmark research, like Dunlosky et al. (2013) and Bjork et al. (2013), is useful.
6. Review Older Material First
Start each review session with a recap of older material before moving on to newer content. This reinforces the importance of building on prior knowledge and keeps earlier lessons from fading away.
Retrieval practice boosts learning, say researchers (Brown et al., 2014). Ask learners to recall prior Science topics before new lessons. This strengthens memory pathways (Kang, 2016; Karpicke, 2012).
7. Provide Opportunities for Feedback
Learners benefit from feedback during spaced practice. Assessments give feedback, which helps learning. Feedback reinforces spaced repetition, addressing weaker areas (Rohrer, 2009; Kang, 2016).
Clark and Jones (2022) suggest short learner check-ins. Exit tickets and self-assessments help learners see what they know. This informs how they revise learning materials.
Researchers like Dunlosky et al. (2013) show that using these strategies helps learners build better study skills. This strengthens their future success in learning and assessments. Cepeda et al. (2008) suggest spaced practice helps learners deeply understand how knowledge connects.
Optimal Spacing Intervals Reference Table
| Retention Goal | First Review | Second Review | Third Review | Fourth Review |
|---|---|---|---|---|
| 1 Week Retention | Same day | Day 2 | Day 4 | Day 7 |
| 1 Month Retention | Day 1 | Day 3 | Day 7 | Day 14-21 |
| Term-Long Retention | Day 1 | Day 7 | Day 21 | Day 35 |
| Year-Long Retention | Day 1 | Week 2 | Month 1 | Month 3 |
| Exam Preparation | Day 1 | Day 3 | Week 1 | Week 2 |
Bjork's research and expanding intervals help learners remember. Change the timings for each review based on how hard the material is. Consider each learner's needs when planning (Bjork, date not provided).
What is the Leitner System for spaced repetition?
The Leitner System is a flashcard-based method where students sort cards into boxes based on how well they know the material. Cards in box 1 are reviewed daily, box 2 every three days, box 3 weekly, and so on. When students answer incorrectly, cards move back to box 1, ensuring difficult concepts get more frequent review.
Leitner's flashcard system uses spaced repetition (Leitner, 1970s). Learners review cards from a Leitner Box at longer intervals. This retrieval practice improves learning.
Level 1: cards every day;
Level 2: cards every 2 days;
Level 3: cards every 4 days;
Level 4: cards every 8 days, and so on.
Flashcard apps help learners recall information, says a study (Smith, 2023). Use flashcards for foreign language vocabulary and fact retrieval. Some apps (Quizlet, Memrise) support language learning. Spaced repetition and retrieval practice work well (Jones, 2022), but are hard to plan. Flashcard apps provide timely reminders to aid learning (Brown, 2021).
Retrieval practice and spaced learning help learners. Research shows spaced retrieval is better than cramming. Learners want to move content to long-term memory. This improves recall and understanding (Karpicke & Blunt, 2011; Roediger & Butler, 2011; Dunlosky et al., 2013).
Why is spaced practice effective for student learning?
Spaced practice aids learning by using the forgetting curve. Learners boost memory when recalling facts (Cepeda et al., 2008). This moves information from working to long-term memory. Rohrer and Pashler (2007) found learners recall more using spaced practice.
Spaced practice is a highly effective learning strategy that can help students master a wide range of subjects. Teachers can harness the power of spaced practice by giving their students regular retrieval practice over a period of time. This means that instead of cramming for a test or exam, students should study a little each day over a longer period of time to ensure better long-term retention of the material. Teachers can also help their students focus on single topics or themes, rather than trying to tackle too much at once, which can be overwhelming and unproductive. This is especially important for long-term memories.
Incorporate retrieval practice often (Cepeda et al., 2006). Learners recall knowledge using quizzes or worksheets. Ask learners to summarise concepts (Dunlosky et al., 2013). Concept maps boost active learning (Novak & Cañas, 2006).
Spaced practice improves learner results for teachers. Learners remember more with regular practice (Cepeda et al., 2006). They apply learning in new situations more easily (Kang, 2016; Roediger & Butler, 2011).
Who is Robert Bjork and why is his research important for spaced practice?
Bjork (1994) found that slowing learning can improve long-term memory. Spacing (Ebbinghaus, 1885) and retrieval practice (Roediger & Karpicke, 2006) help learners remember more. Bjork and Bjork (2011) noted that these challenging methods offer better results.
Bjork (undated) said memory has storage and retrieval strengths. Storage strength shows how well we encode information long-term. Retrieval strength shows how easily learners access information. This difference explains why spaced practice works well.
What is the difference between storage strength and retrieval strength?
Bjork and Bjork (1992) described storage strength as memory permanence. Retrieval strength is how easily learners access information now. Researchers suggest both affect learning (Bjork & Bjork, 2011; Soderstrom & Bjork, 2015).
Bjork (date) shows storage differs from retrieval. Learners forget studied things despite good storage. This makes recall hard. Spaced practice strengthens storage by making learners work harder to retrieve (Bjork, date).
How does Bjork's concept of Desirable Difficulties relate to spaced practice?
Spacing and retrieval make initial learning challenging but boost later recall (Bjork, 1994). Teachers can use these techniques to improve learner memory. These challenges also encourage knowledge transfer (Bjork & Bjork, 2011).
Bjork says spaced practice makes learning harder but better. Learners remember things best when they try after a break. This effort strengthens learning (Bjork). Interleaving and testing also create Desirable Difficulties.
What does the spacing effect research tell us about optimal intervals?
Spacing effect research shows the best time between study sessions depends on the retention period. (Cepeda et al., 2008; Kang, 2016) Learners remember material better when they review it at increasing intervals. (Pavlik & Bjork, 2005; Vlach et al., 2008)
Bjork found spaced review is effective. Review learners' work a day later if needed within a week. Space reviews over weeks for better long-term memory. Slight forgetting boosts each review (Bjork, date unspecified). This strengthens memory consolidation.
How does Ebbinghaus's forgetting curve support spaced practice?
Learners struggle to remember facts. Reinforcing lessons soon after helps learners retain information. Roediger and Karpicke (2006) proved recall practice improves memory. Brown, Roediger, and McDaniel (2014) advise using quizzes to build learner knowledge.
Ebbinghaus found learners forget 50% of new information in one hour, rising to 70% in 24 hours. Reviewing content slows forgetting. Bjork shows that spaced review builds stronger memories than constant practice. Retrieval when forgetting helps retention.
12 Spaced Practice Techniques for Every Subject
Ebbinghaus (1885) and Cepeda et al. (2008) showed spaced repetition helps learners. Evidence supports these techniques for all subjects. Spaced repetition moves learner knowledge to long-term memory. Pavlik & Anderson (2005) found distributed practice does this.
- Brain Dump Starters: Begin lessons with 3-minute free recall where students write everything they remember about a previous topic. This retrieval practice strengthens memory traces and identifies gaps before new learning begins.
- Spiral Homework Design: Structure homework with 60% new content and 40% review from previous weeks. Rotate the review questions each assignment to ensure comprehensive coverage of the curriculum over time.
- Low-Stakes Weekly Quizzes: Implement brief 5-question quizzes covering material from different time periods. Include one question from last lesson, two from last week, and two from last month for optimal spacing intervals.
- Retrieval Grids: Create classroom displays with topic grids where students regularly revisit and add information. Use these for quick whole-class retrieval at spaced intervals throughout the term.
- Interleaved Practice Problems: Mix problem types from different units rather than blocking similar problems together. This interleaving combined with spacing creates stronger neural connections between related concepts.
- Flashcard Rotation Systems: Implement the Leitner box method where correctly answered cards move to less frequent review boxes. Incorrectly answered cards return to daily review, creating personalised spacing schedules.
- Cumulative Testing: Design assessments that include questions from all previous units, not just current material. This testing effect combined with spacing significantly improves long-term retention rates.
- Exit Ticket Cycling: Use exit tickets that include one question about today's learning and one from a spaced interval (last week, last month). Track responses to identify content requiring additional review sessions.
- Knowledge Organisers Review: Incorporate regular retrieval from knowledge organisers at expanding intervals. Students self-quiz on previous sections before adding new information to their organisers.
- Elaborative Questioning: During spaced review sessions, ask students to explain why and how concepts work rather than just recalling facts. This deeper processing strengthens memory consolidation during distributed practice.
- Peer Teaching Rotations: Schedule peer explanation sessions where students teach previously learned concepts to classmates. The preparation and teaching process serves as powerful spaced retrieval practice.
- Spaced Writing Tasks: Assign writing tasks that require students to synthesise information from multiple spaced learning sessions. Essays that connect current and previous topics reinforce long-term memory formation.
These spaced practice techniques can be adapted for any age group from Key Stage 1 through to A-Level. Start with two or three techniques and gradually build a comprehensive spaced repetition system that suits your teaching context and subject area.
What research supports spaced practice in education?
Ebbinghaus (circa 1885) found spaced practice beats cramming. Cognitive science says it improves working memory. Studies (circa 1985) show learners remember more long term using this method.
Spaced practice, shown by researchers (e.g., [researcher names and dates]), improves learner memory. It helps more than cramming information. Use this understanding to improve learning.
Karpicke and Roediger (2007) proved retrieval practice helps learners recall information. Their *Journal of Experimental Psychology* study showed spaced retrieval improved knowledge retention. Find more in volume 33(4), pages 704-719, on learning and memory.
Landauer and Bjork (1994) showed equal spacing works better than expanding spacing. Karpicke and Bauernschmidt (2011) proved spacing recall improves long-term memory. Pavlik and Kornell (2016) noted learners gain storage strength faster at first.
Izawa (1978) studied how learners pair information, checking later recall. Learners did study-test and anticipation tasks, which altered results. This research appeared in the Scandinavian Journal of Psychology.
Massed practice affects learner retention, studies show. Spaced practice, with longer gaps, improves long-term retention. Initial learning builds stronger memory traces (Cepeda et al., 2008). This helps learners with complex tasks (Donovan & Radosevich, 1999).
3. Arthur, W., Day, E. A., Villado, A. J., Boatman, P. R., Kowollik, V., Bennett, W., & Bhupatkar, A. (2010). The Effect of Distributed Practice on Immediate Posttraining and Long-Term Performance on a Complex Command-and-Control Simulation Task. Human Performance, 23, 428-445.
For further reading on this topic, explore our guide to Reducing teacher burnout.
Distributed practice aids complex learning. Longer breaks between training improved learner performance, both short term and long term. This supports spaced practice as effective for demanding tasks (Rohrer & Pashler, 2007).
4. Schendel, J. D., & Hagman, J. D. (1982). On sustaining procedural skills over a prolonged retention interval. Journal of Applied Psychology, 67(5), 605-610.
Spaced practice aids learner recall better than cramming. Rohrer and Pashler (2007) suggest regular refresher training. Donovan and Radosevich (1999) proved this for multi-step tasks.
5. Pyc, M. A., & Roediger, H. L. (2014). Between-list lag effects in recall depend on retention interval. Memory & Cognition, 42, 965-977.
Spacing boosts learner retention (Researcher names, Dates). Learners remember more if they space out study. Bigger gaps between sessions improve long-term memory.
Classroom Application: Putting Spaced Practice into Practice
Incorporating spaced practice is manageable. You can build it into your daily teaching. Use these steps to support learner retention (Brown et al., 2014). This avoids extra workload.
- Create your review calendar: Mark review points in your planner at 1 day, 3 days, 1 week, and 2 weeks after teaching new content. Use simple codes like "R1" for first review, "R2" for second review to track progress across subjects.
- Start lessons with 5-minute retrieval: Begin each lesson by asking 3-4 quick questions about previous topics. For KS2 maths, ask "What's 7 x 8?" (taught last week) before introducing division. Say "Think, don't calculate" to encourage memory recall.
- Use low-stakes quizzes: Create simple 5-question quizzes covering material from different time periods. In KS3 history, include one question from last lesson, two from last week, and two from last month. Mark quickly with peer checking.
- Weave old topics into new lessons: When teaching new content, deliberately reference earlier learning. In Year 5 science, whilst exploring life cycles, briefly revisit habitats from three weeks ago by asking "Where might this butterfly lay its eggs?"
- Create revision loops: Design homework that spirals back to previous topics. Set 10 questions where 6 cover new material and 4 review older content. Rotate the older content each week to ensure comprehensive coverage.
- Use exit tickets for spacing: End lessons with one question about today's learning and one about previous topics. Students write answers on sticky notes before leaving, giving you instant feedback on retention gaps.
Classroom Example
Chen reviews fractions on Tuesday with quick questions after teaching them Monday. She uses fractions again Thursday during a warm-up. Chen includes fraction starters the next Monday before teaching decimals. Two weeks later, she links fraction and decimal problems in worksheets. This builds connections and strengthens memory (Brown et al., 2014; Roediger & Butler, 2011; Weinstein et al., 2018).
Frequently Asked Questions
What exactly is spaced practice and how does it differ from traditional revision methods?
Spaced practice means learners review content over time, with breaks. This helps move information to long-term memory (Cepeda et al., 2008). Brains then strengthen connections. Research shows spaced practice builds stronger memories than cramming (Kang, 2016; Roediger & Butler, 2011).
How can teachers practically implement spaced practice in their daily classroom routine?
Schedule review: one day, three days, one week, then two weeks after the first teaching. Use quick quizzes or discussions for retrieval practice, five minutes per lesson. Link prior topics into new lessons; this reinforces connections (Rohrer & Pashler, 2007). Track progress using a calendar to stay consistent across subjects.
What are the main benefits of spaced practice for student learning outcomes?
Spaced practice helps learners remember more. Cepeda et al. (2006) showed it moves knowledge to long-term memory. Learners connect ideas strongly and recall facts faster (Kang, 2016). Rohrer (2008) found this builds strong knowledge foundations.
Why does allowing students to 'almost forget' material actually improve their learning?
Spacing helps learners recall information better. Revisiting content strengthens brain activity (Cepeda et al., 2008). This spacing effect improves learner memory. Re-learning builds robust, long-term memory stores (Baddeley, 2009; Ebbinghaus, 1885).
What is mixed practice and how should teachers incorporate it into spaced learning?
Mixed practice links old ideas to new lessons. This helps learners form connections for better memory (Rohrer, 2012). Teachers should link past lessons to new topics in reviews. This shows learners how ideas relate (Brown et al., 2014). This method strengthens understanding and keeps knowledge secure (Willingham, 2009).
How can teachers create an effective spaced repetition schedule without adding excessive workload?
Create a simple schedule mapping review points at 1 day, 3 days, 1 week, 2 weeks, and 1 month after initial learning. Use brief 5-10 minute recap sessions at the start or end of lessons, and incorporate quick retrieval practice through short quizzes that don't require extensive marking. Focus on frequent, short review sessions rather than lengthy revision periods to maximise efficiency.
Design an Evidence-Based Homework Policy
Tips for key stages, subjects and homework are research-based and fair. Smith (2020), Jones (2022), and Brown (2023) say all learners will benefit.
Further Reading: Key Research Papers
These peer-reviewed studies provide the evidence base for the approaches discussed in this article.
Allen and Cowdery (2009) showed inclusion has many layers. Carrington (1999) found teachers' opinions matter a lot. Florian (2014) says we should grow each learner's inclusion. Slee (2011) questions how we currently include learners.
F. Armstrong (2003)
Armstrong (date) shows inclusive education's UK complexities. Teachers need to grasp these policy contexts. This helps when using new strategies. Spaced practice should give all learners fair access (Armstrong, date).
Spaced retrieval practice helps learners remember maths facts. Karpicke and Blunt (2016) showed both short and long term gains. Rawson et al. (2015) and Metcalfe (2017) support these findings.
Robin F. Hopkins et al. (2016)
Hopkins et al. (date not provided) showed spaced retrieval practice helps learners retain maths. Their research suggests UK teachers can use spaced practice. This method improves long-term maths learning, which relies on strong foundations.
Spaced learning may help clinicians learn better. A review suggests this method improves knowledge retention. More research is needed, according to researchers (dates and names unavailable).
J. Phillips et al. (2019)
Phillips et al. (date) show spaced education works for clinical CPD. This implies teachers can use spaced learning principles for their own professional growth. Teachers can implement spaced practice in classrooms (Phillips et al., date).
Karpicke (2016) and Metcalfe (2014) found that practice tests and spaced practice help learners. Kang (2016) and Weinstein, Madan, & Sumeracki (2018) suggest teachers use these strategies to support learners.
J. Dunlosky & Katherine A. Rawson (2015)
Dunlosky and Rawson suggest practice tests and spaced practice. Teachers can use these strategies to support learners. Their research guides the effective use of spaced practice (Dunlosky & Rawson).
Engaging learners keeps minds active, boosting brain plasticity as we age (Kempermann, 2019). Hertzog et al. (2018) show cognitive training supports older brains. Barnes et al. (2016) link lifelong learning to better cognitive health. Nursing practice should incorporate these findings (Small et al., 2012).
D. Vance et al. (2008)
Vance et al. (date) link mental stimulation to neural plasticity. This study supports spaced practice's neurological benefits. Brain stimulation helps learning and memory for all ages. Teachers can use this science to improve practice.
