6 evidence-based revision techniques to use in the classroom

Most secondary teachers spend a stretch of every spring term running revision lessons. The frustrating thing is that the techniques that work best in revision are not the ones students gravitate towards on their own. Left to themselves, classes re-read notes, highlight textbooks, and watch videos. All three feel productive. None produce particularly strong long-term recall.

The research on what does work is consistent. Dunlosky and colleagues' 2013 review evaluated ten widely used study techniques and ranked them by evidence. The top of the list is dominated by methods involving effortful retrieval, spacing, and active construction of meaning. The bottom is dominated by methods that feel productive but do little to move information into long-term memory.

This guide focuses on six techniques you can run inside a single lesson with a normal class. The framing is teacher-first: How do I design a revision lesson so the high-evidence techniques are the ones students actually use?

Two cognitive habits work against students left to revise alone.

The first is the fluency illusion. When students re-read familiar material, the words feel easier the second time round, and that fluency feels like understanding. It is not. Recognising a phrase on the page does not mean a student could produce it under exam conditions. Most students overestimate how well they know material until they try to retrieve it without notes.

The second is the preference for comfort over challenge. Effortful techniques like retrieval practice and self-explanation feel harder than passive ones. Without guidance, students reach for what feels productive rather than what is. A well-designed revision session pushes students into the harder techniques and shows them why the discomfort is the point.

Retrieval practice, or the testing effect, is the highest-evidence technique on the list. Students try to pull information out of memory rather than putting more in. The act of retrieval (whether successful or not) strengthens the memory and the cues that lead to it.

The simplest classroom format is a structured retrieval task. Give students a topic prompt: 'Everything you know about the menstrual cycle' or 'Causes of the English Civil War'. Set a five-minute timer. Students write everything they can recall on a blank sheet with no notes in sight. Then reveal a model answer or content checklist, and students annotate their work in a different colour, filling in gaps and correcting errors.

This activity does two jobs at once. It surfaces what students do and do not know, directing further revision. And it provides the retrieval rep itself. Run it weekly across a half-term and students see gaps closing in their own handwriting, which is more persuasive than any speech about active recall.

Spaced practice means revisiting material at intervals rather than in one block. The same total time produces substantially more durable learning when spread across weeks than concentrated in one session. Cepeda and colleagues' 2006 meta-analysis is the canonical reference, and the spacing effect is one of the most replicated findings in learning science.

In the classroom, spaced practice is mostly a planning move. Your revision lessons across a half-term should systematically revisit older material. A useful pattern: Every revision lesson covers one new topic in depth, but includes a starter quiz on a topic from two weeks ago and an exit activity on a topic from earlier in the year. Students may grumble at first. The grumbling stops once they realise the spaced revisits are pulling material back into reach.

For students to do spaced practice at home, they need a planner. A simple weekly grid where they mark which topics they have revised and which need revisiting next is enough. Department-issued revision planners with built-in spacing schedules save students from defaulting to a cramming schedule.

Interleaving means mixing different topics or problem types within a single session, rather than working through one topic to exhaustion before moving on. It runs against students' intuitions (and many teachers' too), but the evidence base is solid, particularly in maths and the sciences.

The mechanism: Interleaving forces students to identify the type of problem before solving it. Work through twenty quadratic equations in a row and you do not need to think about which method to apply. Face a mixed set with quadratics, simultaneous equations, and surds, and you have to first recognise what kind of question it is. That recognition step is exactly what students need to practise for the exam.

In a revision lesson, interleaving usually means designing the practice set rather than running a new activity. A maths lesson might include two questions on the topic of the week, two from a fortnight ago, two from last term. A history lesson might mix causation, significance, and source analysis. Students find this harder, which is the signal it is working.

Dual coding combines verbal information with visual so memory is supported by two complementary channels. Mayer's research on multimedia learning shows students remember more from well-designed combinations of words and pictures than from either alone. The qualifier matters: A page of text with a decorative photo on the side does not count.

Useful dual coding tasks include diagram completion (students reproduce a diagram from memory and add labels), flow chart construction (students sequence a process visually), and mind map building from a blank page. The goal is for students to construct the visual themselves, not consume a pre-made one. Construction is where the learning happens.

A practical format: Give students a key topic (the heart, the Russian Revolution, the carbon cycle). Set fifteen minutes to produce a single page combining a diagram, key terms, and short explanations. No notes allowed. Compare results in pairs and add anything missed. The output is a personal one-page summary for future revision.

Elaboration means connecting new information to existing knowledge by asking how and why. Instead of memorising the fact that haemoglobin binds oxygen, a student asks why the structure makes this possible, how binding changes in different conditions, and what would happen if it did not. The questions force students to integrate the fact into a broader web of understanding rather than store it in isolation.

The classic prompts are 'why does this make sense?' and 'how does this connect to something else you know?' Students who ask these while revising tend to remember more and apply better in unfamiliar exam questions. The challenge is that students rarely do this on their own.

A workable classroom move is to build elaboration into structured revision pairs. Students work in twos with a topic prompt and a short list of elaboration questions: Why does this happen? What causes it? How does it connect to topic X? What would change if Y were different? They take turns asking and answering. After a few sessions, students start asking these questions without prompting.

Self-explanation overlaps with elaboration but is more focused. Students explain a worked example or process to themselves step by step. Putting the explanation into their own words reveals gaps that passive reading hides and consolidates the steps in memory.

In revision lessons, self-explanation works well for material with a clear procedural structure: A maths worked solution, an extended response answer, an essay paragraph. Provide the example. Ask students to annotate it by explaining what is happening at each step and, crucially, why that step is the right move. The why is where the learning lives. Students who can only describe what happened have memorised a procedure. Students who can explain why each step was chosen have understood the underlying logic.

For essay subjects, self-explanation maps onto model answer analysis. Give students a high-grade response. Ask them to explain the structural choices: Why does this thesis statement work? Why does this paragraph open with the writer's name rather than the quotation? The process produces a sharper understanding of what good looks like than simply reading the model once.

Each of the six does a slightly different job, and they combine well rather than competing. The table below summarises what each is best for and how to recognise it working in a lesson.

Knowing the six techniques is one thing. Designing a sixty-minute lesson that uses them is another. The risk is cramming all six into one hour, producing a lesson that touches everything and consolidates nothing.

A workable structure: Anchor the lesson on retrieval practice and pair it with one or two other techniques chosen for the topic. For a process-heavy topic in biology, retrieval plus dual coding works well. For mixed problem types in maths, retrieval plus interleaving. For essay subjects, retrieval plus self-explanation on a model answer. Pick two strong techniques rather than dabbling in five.

Leave room for students to do something with the output. A lesson that ends with a one-page summary, a gap list, or an annotated model gives students a takeaway they can reuse. A lesson that ends at the bell with no artefact is harder to translate into independent study.

Classroom sessions land best when students use the same techniques in their own time. This rarely happens automatically. A deliberate handover helps.

At the end of a revision lesson, ask students to plan one home-revision session for the coming week using the same technique. 'Tonight, do a five-minute blurt on the reactions of group 1 metals, then check it against your notes.' This converts the in-class activity into a home routine with no new technique to learn. After a few weeks, students start choosing techniques themselves.

It also helps to share a short rationale at some point. Not a full cognitive science lecture, but enough that students understand why these techniques feel harder and why the feeling is the point. Students who grasp the desirable difficulty principle are more likely to stick with effortful techniques when the going gets tough, especially during the Easter holidays.