Physics tuition, Class 9 and 10

Physics is not a separate subject at Class 9 and 10 in most Indian schools - it sits inside Science, alongside the chemical and biological strands, and is examined in the same paper. It is worth naming separately anyway, because it fails separately.

In broad terms, Class 9 works through motion, force and the laws of motion, gravitation, work and energy, and sound. Class 10 moves to light - reflection and refraction - the human eye, electricity, and the magnetic effects of an electric current.

Those two years are structurally different from each other, and it explains a common pattern. Class 9 physics is largely mechanics: one family of ideas, heavily numerical, built directly on algebra. Class 10 physics is more varied, with light and electricity each having their own conventions and their own diagrams. A student can be fine in one year and struggle in the other for reasons that have nothing to do with effort.

NCERT has revised its Class 9 and 10 Science content more than once in recent years, and schools are not all on the same edition. We teach from the book your child was issued rather than from a syllabus list - a photo of the contents page is the most useful thing you can send.

If a student can state Newton's second law correctly and still cannot finish the numerical, the physics is not the problem. This is the single most common thing we find in Class 9.

The arithmetic physics quietly assumes:

• Rearranging a formula. Going from one form to another without losing a sign. This is Class 7 and 8 algebra, and it is where most numerical marks are actually lost.
• Powers of ten and standard form. Multiplying and dividing quantities written as ten to the power of something, without producing an answer a thousand times too big.
• Unit conversion before substitution. Kilometres per hour into metres per second, centimetres into metres, grams into kilograms. Converting after the calculation rather than before is a silent, repeatable, expensive error.
• Decimals and ratios. Especially in electricity, where resistances in parallel produce fractions students find genuinely unfamiliar.

The reason this matters so much is that the fix is completely different depending on the diagnosis. More physics practice does nothing for a student whose algebra is shaky - it just produces more wrong answers with better-remembered formulas. A few weeks of repair on the maths itself often moves the physics mark more than a term of physics revision would.

The check takes five minutes. Give them a formula and ask them to make a different letter the subject, with no physics attached. If that is hard, you have found it.

Three specific pieces of Class 9 and 10 physics reward being taught explicitly, and are usually left to be picked up by osmosis.

Derivations. Students memorise them as blocks of text and reproduce them with a step missing, which scores badly because the marks are awarded per step. Taught as a chain - each line following from the one above for a stated reason - they become reconstructible rather than memorised, and a student who forgets a line can rebuild it.

Ray diagrams. These are drawing skills with conventions attached: arrows on the rays showing direction, the object drawn as an arrow, dotted lines for virtual rays, the principal axis and focus marked. Almost every diagram mark lost is a convention that was never taught rather than physics that was not understood.

Circuit diagrams. Standard symbols, drawn with a ruler, with the ammeter in series and the voltmeter in parallel. Students who redraw a messy circuit as a clean one before solving it make far fewer errors - that redrawing is itself the technique, not a neatness habit.

All three are practised weekly rather than saved for revision, because all three are habits.

Batches , and every student works a numerical at the board in every class - which is the only way to see where the working goes wrong rather than just that the answer did.

• Diagnose maths first. Before any physics teaching, we check the algebra, the units and the powers of ten. If those are the problem we say so plainly, and fix them.
• Units written at every line. Not only in the final answer. It catches conversion errors while they are still cheap.
• Estimate before calculating. Roughly how big should this be? It catches decimal-point slips that careful working will not.
• Derivations rebuilt, not recited. Students are asked to justify each line, so a forgotten step can be reconstructed.
• Board-pattern questions from Class 9. The format should be old news by the time it counts.

Where a student needs to close a specific gap quickly, one-to-one for a term is usually the efficient route before moving into a batch. Both are on the fees page, and the assessment is free.