Teach-back means explaining a topic in your own words, then checking where the explanation breaks down. Research on study methods favours testing and spacing over re-reading. CoreMark Coach, a Cambridge Lower Secondary Stage 9 tutor that runs in Claude, uses it in Learn mode, and you can run it at home with no AI.
CoreMark makes CoreMark Coach, which uses the teach-back method described here. The method works without it, and most of this post is about doing it at home.
Teach-back means explaining a topic in your own words
Teach-back is a study method in which you explain a topic in your own words, without your notes, and then check the explanation against the source. It is a widely used study technique. The research behind related methods is real but limited, so treat it as a sensible habit with no guarantee of results.
The difference from re-reading is where the effort goes. Re-reading asks your eyes to recognise words you have already seen. Teach-back asks your memory to produce the ideas, and that is where the gaps show up. CoreMark Coach, the Cambridge Lower Secondary Stage 9 tutor that runs inside Claude by Anthropic, uses this method in its Learn mode. The rest of this post works through one real example, then shows how to run the same method at the dinner table with no AI at all.
A real teach-back, read line by line
This excerpt is from a demo session shown on the Coach page, in the Stage 9 Science topic on the greenhouse effect. The student's mistakes are left in, because they are the useful part to study.
Excerpt from a demo session shown on the Coach page (Stage 9 Science, greenhouse effect)
Your turn — teach it back to me:
What is the difference between the natural greenhouse effect and the enhanced greenhouse effect? 😊
Greenhouse effect is like when if you burn fossil fuel oxygen releases, so the Earth gets more heated, and the temperature rises and effect automatically will happen like it will get a lot of flood. It will affect the marine life. The ice will melt.
Really good — you’ve nailed the effects of climate change perfectly! 🎯
But there’s one thing to fix:
Burning fossil fuels releases CO₂ — not oxygen!
Oxygen is what we breathe — CO₂ is the greenhouse gas that traps heat.
And you didn’t quite answer the difference between natural vs enhanced greenhouse effect. Here it is:
Natural greenhouse effect = CO₂ and other gases naturally trap some heat → keeps Earth warm enough for life ✅ — this is GOOD
Enhanced greenhouse effect = humans add EXTRA CO₂ (burning fossil fuels, deforestation) → too much heat trapped → Earth gets too warm → climate change ❌ — this is BAD
Key sentence to remember for your exam:
“Human activities increase CO₂ levels, enhancing the greenhouse effect and causing global temperatures to rise.”
Read the student's answer as four jobs. Coach has to say what is right, catch what is wrong, notice what was left out, and give the student one sentence to keep. The table shows how the reply handled each job.
| Job | What the student wrote | What Coach did |
|---|---|---|
| Got right | The effects: flooding, harm to marine life, melting ice | Praised the effects specifically, in the first sentence of the reply |
| Got wrong | Says burning fossil fuels releases oxygen | Corrected it: burning fossil fuels releases CO₂, not oxygen, and oxygen is what we breathe |
| Left out | Never answered the question about the natural versus enhanced greenhouse effect | Answered it directly: the natural effect keeps Earth warm enough for life, while the enhanced effect comes from extra CO₂ and makes Earth too warm |
| Something to keep | Nothing yet | An exam-ready sentence: "Human activities increase CO₂ levels, enhancing the greenhouse effect and causing global temperatures to rise." |
The order matters. The praise came first and was specific. The fix for the error took one sentence. The missing part got the longest answer, because the student had not yet learned it. A parent can run the same check on any answer: which parts are right, which are wrong, and which part of the question never got an answer.
Why explaining finds gaps that re-reading hides
Re-reading feels productive because the page looks familiar, and familiar is easy to mistake for understood. A teach-back stalls at the exact point where the idea is fuzzy, so the gap shows up in front of you.
The research points the same way, with limits. A 2013 review by Dunlosky, Rawson, Marsh, Nathan and Willingham looked at ten study techniques, rated by US cognitive psychologists. It rated practice testing and distributed (spaced) practice as high utility, self-explanation and elaborative interrogation as moderate, and rereading as low. The review says the evidence varies by learner, material and task. (Dunlosky et al. (2013), Psychological Science in the Public Interest)
Roediger and Karpicke's 2006 experiments used prose passages. Students who took recall tests remembered substantially more a week later than students who only restudied, even though the restudy group felt more confident. On a test five minutes later, restudying did better. That was a lab study with reading passages, so it does not tell you what will happen with your child's Science notes. (Roediger and Karpicke (2006), Psychological Science)
Cepeda and colleagues combined 839 assessments from 317 experiments in 2006. They found that the best gap between study sessions grows as the material has to be remembered for longer. That review covered verbal recall tasks, so it is about spacing practice out. (Cepeda et al. (2006), Psychological Bulletin)
These are research on testing, spacing and self-explanation, not on teach-back as such. Teach-back is a widely used study technique, and this is the closest research we can point to, so it is a sensible habit, not a settled finding. If your child can follow steps but cannot say why they work, the same gap appears in algebra, and this post on algebra steps and understanding covers it.
Six things to say at the dinner table, with no AI
You do not need a tutor to run a teach-back. Pick one topic from this week's homework, then say these six prompts in order. Let your child answer each one before you add anything.
- "Teach it to me like I'm in Stage 7." Your child explains the topic to you as if you were a younger student. Listen for the words they use and the ones they avoid.
- "Give me an example from football." Any example from their world will do: games, phones, food or money. If they cannot find one, the idea is probably still fuzzy.
- "Say it again without using the key word." This checks whether they understand the idea or only remember the label.
- "What do people usually get wrong about this?" Naming a common mistake shows whether they know where the idea stops applying.
- "Which bit did you have to guess at?" Children often know where the gap is if you ask directly. Note the answer and return to it in a later session.
- "Ask me a question you think I would get wrong." Reversing roles tests whether they can build a question from the idea, not just repeat it.
If your child stalls, ask for the smallest true sentence they can say, then build from there. Giving the full answer straight away skips the part where the gap shows up, so hold back until they have tried.
What a good teach-back sounds like next to a recited definition
A recited definition can be word-perfect and still tell you very little. The table puts two answers to the same question side by side: what the greenhouse effect is. Both are illustrations we wrote, not answers from real students.
| A recited definition | A real teach-back |
|---|---|
| "The greenhouse effect is when greenhouse gases trap heat in the atmosphere." | "Sunlight warms the ground, and some of that heat tries to escape back into space. CO₂ and a few other gases slow the escape, which is why the planet stays warm enough for life." |
| Uses the textbook words, in the textbook order | Starts from something seen, such as a car left in the sun, then adds the words |
| Stops once the definition has been said | Gives an example and says where the example breaks down |
| Cannot answer "why?" | Holds up under "why?" and "what if we burn much more fuel?" |
| A parent cannot tell where it goes wrong | The gaps are visible, so they can be fixed |
The right-hand column is not longer for its own sake. It has an example, a cause and a limit. If your child's answer has none of the three, ask for one. For science vocabulary specifically, this guide on revising science definitions goes into more detail.
What CoreMark Coach adds, and what it cannot do
CoreMark Coach adds three things to a teach-back. It replies to each explanation straight away, so the gap is named while the idea is still fresh. If the first explanation is fuzzy, it re-teaches with a different example rather than repeating the same one. And it finishes with a key sentence worded the way examiners like, as in the greenhouse example above.
It cannot replace you listening. Coach cannot hear a hesitation, see your child's face, or tell whether they are tired or upset. Keep the dinner-table version going alongside it, and ask the questions yourself. AI can make mistakes, so check any fact against the textbook or the booster solutions.
The Coach page has the price and what is included, and the setup guide shows how a parent gets it running, since Claude accounts must belong to an adult.
See how Coach works
CoreMark Coach is an AI tutor for Cambridge Lower Secondary Stage 9 that runs in Claude.
Frequently asked questions
Ask the same question in different words, then ask for an example from their own life. A recited definition usually breaks at the first example or the first "why". CoreMark Coach's Learn mode works the same way: if an explanation is fuzzy, it re-teaches the idea with a different example and asks for a teach-back again. Give your child that second go too.
A teach-back for one idea does not need to be long. Stop when your child gives a clear explanation with an example, or when they name the part they cannot yet explain. Leave that part alone for a day or two, then come back to it. The research on spacing, covered in the Cepeda et al. review, supports returning later rather than cramming in one sitting.
Yes, for the ideas behind the method, not just the steps. Ask your child to explain why a method works, such as why we multiply to find the area of a rectangle, or what a ratio actually compares. A child who can follow steps but cannot say why is the gap this method is designed to catch. CoreMark Coach's Maths Learn mode asks for the same kind of explanation.
No. A quiz checks whether an answer is right. A teach-back checks whether your child can build the explanation from scratch, which is where a quiz can miss a gap. Many revision plans use both. In CoreMark Coach, Learn mode includes a teach-back and one quick apply question, and Exam mode gives a full practice paper with marking.
Coach teaches the idea in small steps first, with a diagram and an everyday example. Then it asks your child to explain it back in their own words and gives feedback on what is right, what is wrong and what is missing. CoreMark Coach is an AI tutor for Cambridge Lower Secondary Stage 9, it runs only in Claude, and AI can make mistakes, so check important facts against the textbook or the booster solutions.
Sources & further reading
- Psychological Science in the Public Interest, Dunlosky et al. (2013), "Improving students' learning with effective learning techniques", psychologicalscience.org
- Psychological Science, Roediger and Karpicke (2006), "Test-enhanced learning: Taking memory tests improves long-term retention", doi.org
- Psychological Bulletin, Cepeda et al. (2006), "Distributed practice in verbal recall tasks: A review and quantitative synthesis", yorku.ca
Last updated 20 October 2026. Details about other companies and research were checked against their own pages on 20 October 2026; check current terms, features and prices before you decide.
CoreMark Coach is an independent product that runs in Claude, made by Anthropic. CoreMark is not affiliated with Anthropic or with Cambridge Assessment International Education. AI can make mistakes: check important answers, and supervise your child's use.