Distribute Practice Over Time

The strategy, as published

Exactly as it appears on the card

Part of Spacing & Interleaving in 01 Retrieval Practice, where it sits alongside its neighbouring strategies, the infographic and the thinking for the whole area.

Why you might use it

The problem it may help with

Ebbinghaus mapped the forgetting curve well over a century ago; Cepeda's work put numbers on the gaps that help most. The finding has not really changed: retrieval spread across days and weeks does more for retention than the same practice massed into one session.

The hard part is not believing it, it is timetabling it. Which is why the card aims this at your medium-term plan rather than your lesson plan: the calendar is part of the pedagogy.

What it might look like

One version of it, in a classroom

Planning a six-week unit, a teacher pencils review points in before the content: week three revisits week one, week five revisits weeks two and three, and the following unit opens by retrieving this one. Nothing about any single lesson changes much; the shape of the term does.

Try it

A way to begin

Take the medium-term plan for your next unit and mark two points where earlier content will come back. Booking the slots is the habit; the questions can be written later.

What to notice

Reading what happens

• What the first spaced review reveals. Material that seemed secure at the time will have faded; that is the forgetting curve, not a teaching failure.
• Whether the review points survive contact with a busy term. If they are the first thing cut, they were never really planned in.

Things to think about

Before and while you use it

• Massed practice feels better in the room, for you and for pupils. Expect the spaced version to look worse lesson by lesson while doing more across the term.

Related strategies

Where this connects

• 🔄 Yesterday, Last Week, Last Month Three questions per lesson: one from yesterday, one from last week, one from last month. These intervals are a starting point; complex topics may need revisiting more frequently. 01 Retrieval Practice · Spacing & Interleaving
• 🕐 The Retrieval Schedule Dunlosky's review ranked re-reading among the least effective strategies. Teach students the evidence: study, return after two days, then a week, then a month. Many students do the opposite. 01 Retrieval Practice · Spacing & Interleaving
• 🔗 Cumulative Review Plan retrieval into your medium-term planning, not just lessons. Bring back earlier content in starters and assessments. When it never reappears, students conclude it no longer matters. 01 Retrieval Practice · Spacing & Interleaving
• 🔁 Spaced Retrieval Practice Low stakes quizzing on prior content, not today's lesson. Returning to older material at increasing intervals is one of the most robust findings in memory research. Re-reading notes is not the same as retrieving. 02 Formative Assessment · Students as Owners of Their Learning
• 📅 Schedule Your Own Spacing Regulating when you study is a planning act. Teach students to set their own calendar reminders to revisit topics over time, owning the spacing rather than waiting to be told. 06 Metacognition & Self-Regulation · Digital Cognition

Technology second

Where technology fits

Spaced repetition tools exist for exactly this problem: they revisit older material at the right intervals automatically, which matches the research while saving you the headache of tracking it manually. If your setting has an approved one, let it carry the scheduling. The intervals are the tool's job; making sure what comes back is worth retrieving remains yours.

The wider thinking

Where the evidence sits

Cepeda and colleagues quantified the gaps Ebbinghaus first mapped, and Dunlosky's reviews place distributed practice in the top tier of study techniques. The card’s attribution stands as published: Cepeda et al.; Ebbinghaus.

The fuller picture, sources included, is in further reading and evidence for Retrieval Practice.