One by one

Practise & automate

One by one is independent work on a series of questions or tasks, with the whole class on the same item at the same time. One question or task is on the screen, everyone works on it in their own seat, and only when the time is up or everyone is done does the next item appear. At the end you look back together: where did it get stuck, and what helped? This is explicitly not an activating structure: nobody has a role and nobody depends on anyone else. What it does do is keep the class together, so you can see which item it gets stuck on instead of thirty students being in thirty places on a worksheet. Built for practice after the explanation, a check without a grade, and a few questions at the end of the lesson.

5 items · ± 14 min

Put it on the board

One screen: type your items, one per line, or let the AI write them on your topic. Only you see it; the class sees it only when you press Start.

This exact screen goes on your board. The timer runs per item and you stay in control: pause, add time or move on to the next one. Type the tasks yourself, or with a free account the AI writes them on your topic.

What the class sees on the board

1 step · each item is one round of ± 2 min

One by one

0s in · ± 10 min to go

Item 1 of 5

step 1/1 · Work on the item

Solve: 3x + 5 = 20

Work on this item.

2:00

Work · 2 min

For you: Keeps the class on the same item. Walk the room and note what you see more than once.

Group size

everyone alone, whole class at once

Duration

± 14 min

incl. briefing and look-back

Level

from about age 6 to adults

Materials

your questions, typed or from the book

Format

alone, everyone on the same item

Goal

practise, and see where it gets stuck

Check two things before the first run: are the items roughly the same size, and do they not build on each other? Anyone who misses one must simply be able to carry on. And plan five minutes at the end for the look back. Without them a series is a worksheet with a projector.

Step-by-step instructions

3 steps

One item at a time

One question or task is on screen. Everyone works on it independently; anyone who gets stuck notes down exactly where.

On to the next

When the time is up or everyone is done, the next item appears. That keeps the class at the same point in the series.

Look back together

After the last item you discuss where it got stuck and what helped. This is the part that makes the series more than a worksheet.

Each item is its own slide. The time per item is optional: at 'none' the screen shows only the item, and you decide when the class moves on.

Settings

Questions or tasks: optional. Under What is the lesson about? say briefly what your class has covered, and AI writes them; or type them yourself, one per line. Every line becomes its own slide. Leave the field empty and the tasks are in your materials, on a worksheet or on the board.
How many? 1 to 20 items, default 5. The screen counts along, so the class knows where you are.
Time per step: Work on the item: 2 minutes per item by default, in steps of 15 seconds, up to 15 minutes. At 0 there is no clock: the screen shows only the item and you decide when the next one comes.
When a step ends: Wait for my click by default: at 0:00 the timer stops and you click on. Advance automatically only for short items everyone can finish in the time. Lives under More settings.
People per item: 1 to 8, default 1: everyone on their own, which is what this structure is made for. From 2 they work together on the same task and the Grouping principle counts, Random by default. Both live under More settings.

Which learning strategy does the class train?

Retrieve from memory

Students pull the material from memory without looking in the book. Retrieval is itself a learning event: what you bring back stays better than what you reread. Source: Dunlosky et al. (2013), practice testing, the top rating of ten techniques.

On the boardFrom memory, book closed · You pull it from memory without looking. What you retrieve yourself stays.

Also trainable with this structure

Interleaved practice · Problems of different types mixed, instead of ten of the same.(maths & science)
Judge how well you know it · Looking back: where did it stall, and what do I know now that I didn't at the start?(language: vocabulary)
Show what you understandsupporting · The item where the class stalls tells you which step of your explanation has not landed.

Worksheet: Where it stuck, what helpedPDF For home: From memory, book closedPDF

All learning strategies, with sources →All worksheets →

Read on: Learning to learn happens inside the lesson, not next to it

Why does this work?

A worksheet with ten exercises is thirty different lessons after five minutes: one student is on exercise seven, another still on two, and you do not know which exercise is the problem. One by one puts the same exercises on the screen one at a time, and three things make that different.

Everyone at the same point

Because the whole class works on the same item, you can see where it gets stuck. If ten hands go up at item three, or you see the same mistake ten times as you walk around, the problem is item three, not "the task" and not "this student". That is information a worksheet only gives you when you mark it, and by then the lesson is over. The screen keeps count ("Item 3 of 5"), so the class knows where you are and nobody works ahead.

You set the pace, not the clock

The clock is set to two minutes per item by default, but it is a guide and not a finish signal: at zero the timer stops and you click on. That is a deliberate choice. A screen that moves on while a student is still on item three teaches them to stop thinking when the timer does. If you see that most have finished, move on earlier; if you see it getting stuck, give half a minute more, or switch the clock off altogether and let the screen show only the item.

The look back is the return

What makes the series more than a worksheet is the end. Whoever gets stuck notes down exactly where while working; after the last item you discuss together which item it got stuck on and what helped. Reflecting on independent work is worth as much as reflecting on group work; it is just the step that gets skipped most often, because the bell goes. And a check without a grade is practice in itself: retrieving something from memory makes the material stick more firmly than reading it again, and the look back then shows what was right.

When it fits, when it doesn't

When it fits

For practice after the explanation. Five exercises, from easy to harder, one at a time. You see straight away which step of your explanation has not landed yet, and you can explain it again after the look back, in the same lesson.
As a check without a grade. Three to five questions about the previous lesson or chapter, at the start. Nothing counts; the look back tells you and the class what has stuck and what has not.
When you want to know where exactly it gets stuck. Not whether the class understands, but at which item it goes wrong. For that, everyone has to be working on the same thing at the same moment, and that is exactly what this structure does.
With the exercises from the book. No need to type anything: leave the field empty and just say how many exercises there are. The screen says "The item is on the board or in your book", keeps count and keeps the pace together.
As a few questions at the end of the lesson. Two or three questions about what was covered today, and the look back as the close. What the class does not know at the last question is your first sentence next lesson.

When it doesn't

When you are looking for a discussion about statements. Here everyone works on their own and the class only talks at the look back. If you want to see and discuss positions per statement, take stand up & sit down (agree or disagree, everyone visible at once) or four corners for four positions.
When students should help each other. This structure is not built for that: there is no role that makes anyone responsible for someone else. Take pair coach to practise together, or numbered minds if everyone must be able to explain the answer. Setting the number per item to two is possible too, but know that the quiet student will let the quick one do the maths.
When the pace differs a lot per student. Then half the class waits at every item for the other half. Make the items shorter and of equal size, switch the clock off and move on when most have finished, or choose Pomodoro, where everyone works at their own pace on the same task.
Without time for the look back. Plan the last five minutes for it, even if the series runs over: rather drop an item than the look back. A series without a review is a worksheet with a projector.

One structure, different functions

As a lesson opener: a check without a grade. Three to five questions about the previous lesson are ready as the class comes in. Everyone gets to work at once, nobody has to wait for you, and after the look back you know what has stuck, before you explain anything new.

After the explanation, as the first practice. Five exercises on what you have just explained, rising in difficulty. The item where it gets stuck tells you which step of your explanation has not landed yet, and you have the rest of the lesson to do it again.

As the close: a few questions at the end. Two or three questions about the core of today, and the look back as the last five minutes. The class leaves with the question "what do I know now that I did not know at the start?".

As a diagnosis at the start of a unit. A series of eight questions on what the new unit assumes as prior knowledge. Whatever is missing at the look back decides where you start the unit.

Examples by context

Math · Fractions

Write 1/2 as a fraction with a denominator of 8.
Which is greater: 3/4 or 2/3? Explain why.
Find 1/4 + 2/4.
Find 2/3 of 12.
Draw a strip and show 5/6 on it.

Open ready-made· 14 min Other structures for Math, also ready-made →

English · Spelling

Choose the right word: (Their / There / They're) going to the game tonight.
Add the apostrophes: the dogs bone (one dog), the kids room (one kid), dont.
Write the plural: child, mouse, knife.
Explain when you change y to i before adding -es, and give two examples.
Write a sentence with the word "although".

Open ready-made· 14 min Other structures for English, also ready-made →

History · The Ancient World

Put these in the right order: ancient Rome, the first humans, the Middle Ages.
Name one invention of the first farmers.
Why did the Romans build roads?
How is a historical source different from a story about the past?
Name a monument from ancient times that you can still see today.

Open ready-made· 14 min Other structures for History, also ready-made →

Life Science · The Cell

Name three parts of a cell.
What does the nucleus do?
Name one difference between a plant cell and an animal cell.
Why does a plant cell have chloroplasts?
Draw a cell and label two of its parts.

Open ready-made· 14 min Other structures for Life Science, also ready-made →

Any subject: questions at the end: Three questions about the core of the lesson, and the look back as the close: "what was easy, where did you get stuck?". What you hear is the start of the next lesson.

Vocational and adults: A knowledge check before a module or an exam unit: five case questions, everyone on their own, and at the look back the question which case caused the most doubt.

Variants

No clock set the time per item to zero. The screen then shows only the item, and you decide when the next one comes. Fine when the pace differs a lot per student, or when the items are of unequal length.

With the exercises from the book leave the Questions or tasks field empty and choose only the number of items. The screen says the item is on the board or in the book, and keeps count.

Advance automatically switch automatic advance on for a strict pace: mental arithmetic, a series of words. Only for short items everyone can finish in the time: a screen that moves on while someone is still thinking teaches them to stop thinking.

In pairs set the number per item to two: the pair works together on the same item, and both of them write. Working together is allowed, but know that the quiet student will let the quick one do the maths.

The class adds to the series ask at the look back: "What would you add to this series?" The suggestions that hit the mark go into the series next time. Then the class also practises on exercises it came up with itself, and thinking up a good exercise is already half the learning.

With the live link with the player on the beamer, students can also see the item and the counter on their own screen, handy when the question is long or the board is hard to read.

By age

Ages 4–6. Too early. The structure asks a child to read an item off the screen, work on it alone and remember where they got stuck. If you want the youngest to answer one question at a time while you see how the class is doing, take stand up & sit down: everyone answers at once by standing up or staying seated, and it runs from this age.

Ages 6–8. This is where it starts, with short items: one sum, one word, a picture with a question. Read each item out yourself, give a minute, and keep the series short: three to five. The look back is one question: "which one was hard?".

Ages 8–12. The structure as it is meant: five typed items or five exercises from the book, two minutes per item. Teach the class to note where exactly it got stuck ("at step two", "at the word…") and the look back becomes more than "everything was hard".

Secondary, vocational and adults. A starter check, a practice series after the explanation, a few questions at the end, an exam unit: the structure fits wherever independent work deserves a review. In training it works as a knowledge check before a module.

Common mistakes

Skipping the look back. Then it is a worksheet with a projector. Rather drop an item than the last five minutes.

Letting the clock decide. A screen that moves on by itself chases the class through the series. The clock is a guide: you can see whether most have finished.

Items that build on each other. Whoever misses item two cannot do item three, and sits out the rest of the series. Make every item doable on its own.

Items of very different length. Then at every short item the class waits for the longest. Keep them roughly the same size, or switch the clock off.

Too many items. Twenty is possible, but the look back can carry five to eight: after that nobody remembers where they got stuck. Two short series are better than one long one.

Walking around without noting anything. During the work you see more than the class will say at the look back. Note what you see more than once: that is where the review starts.

Expecting collaboration from it. There is no interaction in it, and that is not the class's fault. If you want collaboration, choose a structure that organises it.

Frequently asked questions

What exactly is the One by one structure?

Independent work on a series, with the whole class on the same item at the same time, in three steps. One: one question or task is on the screen, and everyone works on it independently; anyone who gets stuck notes down exactly where. Two: when the time is up or everyone is done, the next item appears, which keeps the class at the same point in the series. Three: after the last item you look back together at where it got stuck and what helped. Every item is its own slide, the time per item is optional, and you decide when the class moves on.

Is One by one an activating structure?

No, and we would rather say so straight away. There is no role, no interdependence and no mechanism that gets everyone taking part, the three things that make the other structures in the library activating. It is in the library anyway, for two reasons. It keeps the class on the same item, so you can see where it gets stuck. And the look back at the end is not a formality: reflecting on independent work is worth as much as reflecting on group work. If you want students to collaborate, take pair coach or numbered minds.

How long does One by one take?

With the default settings the whole structure takes ± 14 minutes: 5 rounds, briefing and look-back included.

With the default setting, ten minutes of work: five items of two minutes. Add five minutes for the look back, and it is a quarter of an hour. You set the time per item in steps of fifteen seconds, up to a quarter of an hour per item; the number of items goes up to twenty. If you set the clock to zero, your click sets the pace and the duration is whatever the class needs.

Do I have to type the questions in?

No. If you do type them, put each item on a new line: every line becomes its own slide, and the number of items follows by itself. If the exercises are already in the book, on a worksheet or on the board, leave the field empty and choose only how many there are. The screen then says the item is on the board or in the book, keeps count and keeps the pace together.

When do I move on to the next item?

When the time is up or when everyone is done, and you decide that. By default the clock stops at zero and you click on; the clock is a guide for the class, not a finish signal. If you see that most have finished, move on earlier. If you see it getting stuck, give half a minute more. Whoever finishes early checks their answer once more; the screen says so too. Automatic advance is possible, but only for short items that everyone can finish in the time.

How does the look back work?

After the last item the player suggests questions for looking back together. The most important is "Which item did you get stuck on?" That is the question you run the structure for. Others that work well: "What did you do when you could not work it out?", "Which item would you like to do again?" and "Was the time per item right?". Add what you saw as you walked around. Five minutes is enough; end on the next step, not on a judgement.

How is it different from an ordinary worksheet?

The same exercises, a different result. With a worksheet everyone works at their own pace, after five minutes the class is in thirty different places, and you only find out which exercise was the problem when you mark it. With One by one the class works on the same item, you see where it gets stuck while they work, and you discuss it in the same lesson. The price: quick students sometimes wait a little. That is why the items should be short and roughly the same size.

How is it different from Stand Up & Sit Down or Four Corners?

What the class does with the question. In stand up & sit down and four corners everyone visibly takes a position on a statement, and then the class talks about it: it is about viewpoints, and you see them at a glance. In One by one everyone works quietly on their own on a question or task, and the class only talks at the look back. If you are after a discussion about statements, take one of those two; if you want everyone to work through a series of exercises and to see where it gets stuck, take this one.

How do you facilitate One by one?

Walk around while they work and note what you see more than once: that is your first point at the look back. Do not help every student separately with the same item: if you see it three times, it is a question for the class, and you save it for the look back or explain it briefly to everyone after that item. Do not expect interaction: there is none in it. And do not let the look back go when time gets tight; rather drop an item.

How do I put together a good series quickly?

Three rules. Let the items rise from easy to harder, so everyone starts well. Do not let them build on each other: anyone who misses one must simply be able to carry on. And keep them roughly the same size, so nobody waits long. No time? Choose "AI writes them" in the preparation: it writes as many items as you have set, to the same three rules, each on its own line. Read them through before you start. If you prefer your own assistant, such as Microsoft Copilot, copy the request there.

A series of questions with the whole class: which structure fits?

Structure	Goal	Group	Duration	When it fits
One by one	a series of exercises, the class on the same item	alone, whole class at once	± 14 min	practise, and see where it gets stuck
Pomodoro: get to work	focused work in blocks, with a real break	alone, whole class at once	± 40 min	one task, everyone at their own pace
Stand Up & Sit Down	show a position: agree or disagree	whole class	± 9 min	statements, and positions at a glance
Knowledge Quiz	teams answer at once on a board, with a score	whole class, 2–8 teams	± 8 min	see the whole class's answers at once
Numbered Minds	make sure everyone understands	2–6	± 16 min	one right answer, everyone accountable
Flashcards	retrieve facts with cards, at your own pace	pairs	± 15 min	material that has to be known

Sources

Barak Rosenshine, "Principles of Instruction", American Educator (2012): guided and independent practice after the explanation, and checking for understanding during practice; the reason the class stays on the same item.
Dylan Wiliam, Embedded Formative Assessment (2011): end-of-lesson questions and knowing where the class is as the basis for the next lesson; the reason the look back must not be dropped.
Barbara Oakley, Beth Rogowsky & Terrence Sejnowski, Uncommon Sense Teaching (2021): retrieval from memory as what makes material stick, more strongly than rereading; the reason a check without a grade is already practice.

Compiled by Oksana Oliinyk · Last updated 24 September 2026

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