Class 9 Science tuition: the year the three subjects separate

Because the three strands are finally reported separately. A combined Science mark averages three different skills into one number, and Class 9 is the first year that number is broken apart.

This is the most useful thing for a Class 9 family to understand early, because the alternative explanation - that the child suddenly became weaker - is both discouraging and wrong.

In Class 8 the three strands share a mark. Eighty-five in biology, seventy in physics and forty-five in chemistry reads as sixty-seven, and nothing on the report card says which was which. In Class 9 the chemistry mark appears on its own, and it is a shock only because it was never visible before.

The practical consequence is about timing rather than teaching. A family that checked the three strands separately in Class 8 arrives at Class 9 already working on the weak one. A family that did not spends the first term finding out.

Because it is almost always taught as a set of formulas rather than as what it is - a counting unit, like a dozen. A child who has never been told what a mole counts has no way to judge whether an answer is sensible.

A dozen is twelve of anything. A mole is 6.022 × 10²³ of anything - atoms, molecules, ions. That is the whole idea, and it takes two minutes to say.

What usually happens instead is that three relationships are handed over at once - moles from mass, moles from number of particles, mass from moles - and a child starts matching questions to formulas. It works until a question is phrased unfamiliarly, and then nothing works, because there was never an idea underneath the formulas to fall back on.

Two things fix most of it. Say what a mole counts, once, plainly. Then insist on units at every line of the arithmetic, because in mole questions the units are what tell you whether you have divided the right way round.

Because layout is scored separately from the answer, and because velocity-time graphs are read as pictures of a journey rather than as data. Both are habits, and both are cheap to fix.

Two specific things account for most physics marks lost in Class 9.

Layout. Formula first, then substitution, then units carried through every line, then the answer stated with its unit. A correct number written alone scores a fraction of what the same understanding would score written out.

Graphs. A velocity-time graph sloping upwards does not mean the object is going uphill. Children read these as pictures rather than as data, and the fix is to ask one question of every graph: what is on each axis? After that, the slope of a velocity-time graph is acceleration and the area under it is distance, and both follow from the axes rather than from memory.

By assessing the three strands separately in the first session and putting the weight on whichever is weakest, and by teaching the mole concept as an idea before any formula appears.

The first session is three short checks - a mole calculation, a motion numerical, a labelled tissue diagram. Twenty minutes, and it usually confirms what a combined mark had been hiding since Class 6.

After that the teaching is weighted rather than even. There is no value in covering biology thoroughly for a child whose problem is chemistry, and a Class 9 year has no spare time to spend that way.

See Class 9 tuition, Science tuition Class 6 to 10, our free Class 9 Science worksheets, and fees published by class. The free assessment is 20 minutes.