You can recognise every bold term in a science chapter and still struggle when the question changes. Reading "electromagnetic induction" feels familiar; explaining what changes in a coil and why a voltage appears is harder. That gap is useful information. It shows what your next revision session needs to address, rather than how many times you have looked at the page.
Quick 60-Second Summary
Choose one mechanism, explain it without copying, mark the exact gap and check your course source. Keep the correct technical terms, formula and conditions. Finish with a fresh question or diagram so a fluent explanation does not hide an incorrect prediction.
The Feynman Technique is a popular name for studying through simple explanations, finding gaps, and revising them. This guide turns it into a repeatable routine for one science concept at a time. You will finish with a checked explanation, a diagram or formula, and a fresh question to test whether the explanation transfers.
1. Choose a mechanism you can explain on one page
"Biology" is too broad. "How water moves across a selectively permeable membrane" gives you a manageable question. Likewise, replace "electricity" with "why changing magnetic flux induces an emf." Take the topic from your syllabus or a mistake in a recent exercise so the session has a clear purpose.
Read the relevant class material once if the idea is new. Then close it and write what you can recall on a blank page. This is an attempt to expose your current understanding, not a performance for a teacher. A short, incomplete explanation gives you something specific to improve.
Separate the process into a starting situation, a change, and an outcome. Add the important objects: membrane and water, coil and magnetic field, or function call and input. Naming the objects helps prevent sentences that sound polished but never identify what acts on what.
2. Explain the steps in ordinary language
Imagine explaining the concept to a younger student who can ask "why?" after every sentence. You can speak to a friend or record a short explanation for yourself. Say what moves, what stays fixed, and what causes the next step. Replace unexplained jargon with an action or define the term before using it.
Kansas State University's Academic Achievement Center describes a cycle of studying, teaching, filling gaps, and simplifying. Use that cycle as a practical prompt rather than treating one particular age, page length, or number of steps as a rule for every subject.
Keep the scientific vocabulary once you can explain it. In an exam, "selectively permeable membrane" may be the precise term you need. The goal is to understand what the words mean, not to delete every technical expression or replace a correct definition with an inaccurate story.
3. Mark the exact gap and check the source
Circle phrases such as "somehow," "it reacts," or "energy happens." These often hide an omitted step. Also mark a formula you can recite but cannot interpret. Return to the relevant diagram, paragraph, worked solution, or teacher's explanation, then close the source and try that step again.
Use a different colour for corrections so you can see what changed. If two sources seem inconsistent, check whether they use different assumptions or sign conventions. Ask your teacher about an unresolved point rather than memorising the version that sounds easiest.
For example, saying that water moves until both sides have equal salt concentrations can be misleading. In a simple osmosis setup, water moves across a membrane that restricts the solute. A pressure difference can oppose that movement, so equilibrium does not always mean equal solute concentrations. Include the conditions your course actually specifies.
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4. Keep the formula, units, and limits of the analogy
Simple language is a bridge to quantitative work. Write each symbol beside its meaning and units. For a coil with a fixed number of turns, Faraday's law is commonly written emf = -N dflux_B/dt, where magnetic flux per turn changes with time. Explain the negative sign using your course's treatment of Lenz's law.
Moving a magnet relative to a coil is one way to change the flux. Changing the field or the coil's orientation can also matter. A stationary stronger magnet does not automatically produce an induced emf: the relevant quantity must change. With the number of turns fixed, doubling the rate of flux change doubles the magnitude of the induced emf.
Now draw three boxes: change in flux, induced emf, and possible current if the circuit is closed. This last condition matters. An explanation that says "the magnet makes current" skips both the changing-flux requirement and the circuit condition. Check your diagram against the textbook before using it for revision.
Worked example: from a memorised phrase to a checked explanation
This table shows illustrative rewrites. They are starting points for explanation, not replacements for the definitions and assumptions in your syllabus. For each one, add a diagram, a boundary condition, and a question that changes one feature of the setup.
| Concept | Incomplete explanation | More useful explanation and check |
|---|---|---|
| Osmosis | Water moves to salt until everything balances. | Water can move through a membrane that restricts solute; concentration and pressure conditions affect net movement. Which substances can cross? |
| Induction | A strong magnet creates electricity. | A change in magnetic flux induces emf. What happens when the magnet and coil remain still? |
| Recursion | A function repeats itself. | A function calls itself on a smaller or simpler case until a base case stops the calls. Does every call move toward that base case? |
On a new sheet, explain one row without copying. Then answer the check question. If the explanation sounds clear but the answer is wrong, revise the mechanism rather than adding decorative wording. This makes the page a tool for locating errors.
5. Test a fresh question and schedule another attempt
Choose a problem you have not just rehearsed. Predict the answer before calculating, then compare the result with the prediction. For induction, reverse the motion or change the number of turns. For recursion, trace a very small input and check where the calls end. Write down why an incorrect prediction failed.
Use the self-testing routine for the question stage, and fit another explanation attempt into your weekly study plan. Choose the next review from your performance and exam timetable rather than assuming one fixed interval suits everyone.
Common mistakes to avoid
- Explaining an entire chapter at once: split it into individual mechanisms and connect them after each one is understood.
- Keeping the book open throughout: separate the recall attempt from the checking stage so you can identify what you actually remembered.
- Trusting a fluent analogy: note where it stops matching the science. Keep formulas, units, and necessary conditions, then test them with a problem.
Questions students ask
Do I have to remove scientific vocabulary?
No. Define the terms in ordinary language, then use the precise vocabulary your course requires. Simplifying an explanation should not change the science.
What if my explanation sounds clear but the answer is wrong?
Check the mechanism and assumptions against the textbook or teacher's explanation. Trace the exact missing step, revise it, and test a different question.
Can I use this for calculations?
Pair the explanation with symbols, units, assumptions and a worked problem. An analogy alone is not a substitute for checking the calculation.
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- How to Take Class Notes You Can Actually Use
- How to Build a Weekly Study Plan You Can Adjust
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