Biology tuition, Class 9 and 10

Biology, like physics and chemistry, is a strand inside Science at this stage rather than a separate subject, and shares the same paper.

Class 9 begins with the cell as the fundamental unit of life, and with tissues - plant and animal. It is largely structural: what things are made of, and what the parts are called. The diagrams start here and they never stop.

Class 10 shifts from structure to function. Life processes - nutrition, respiration, transport and excretion - then control and coordination, then how organisms reproduce, then heredity. The questions change shape at the same time: Class 9 asks what a structure is, Class 10 asks how a process works and why it is arranged that way.

That shift is the source of most Class 10 biology difficulty. A student whose Class 9 strategy was labelling and naming arrives in Class 10 and finds that naming earns very little. The skill they need - explaining a sequence with a reason at each step - was never asked for before.

As with the rest of Science, NCERT has revised this content in recent years and schools are on different editions, so we plan from your child's actual book.

Biology has more technical vocabulary than the other two strands put together, and unlike physics it offers no formula to fall back on. The word is the answer.

Three specific losses account for most of it.

• Near-synonyms. Writing that something is "sent" rather than "transported", or "made" rather than "synthesised", or describing a structure as "thin" when the mark requires "one cell thick". Examiners award the term, and an approximation is not the term.
• Description instead of explanation. Saying what happens rather than why it happens. A large share of four- and five-mark biology answers are complete descriptions that earn half marks because the causal link was never stated.
• Comparisons written as two paragraphs. A compare question wants a table, or at least matched pairs on the same points. Two separate descriptions, however accurate, do not compare anything.

All three are fixable in weeks, which is why biology is often the fastest strand to improve. The content is usually already known. The marks are being lost in the writing, and that is a much easier thing to change than understanding.

Diagrams. Biology diagrams carry a lot of marks and follow strict conventions: drawn in pencil, labels written horizontally outside the diagram, straight label lines that do not cross and do not carry arrowheads, and a title. A copied diagram teaches almost nothing. A diagram drawn badly from memory, then compared with the book, teaches a great deal, and repeating that four or five times makes it permanent. This is the single highest-return homework in the subject.

Genetics. Heredity at Class 10 is the one part of biology that behaves like maths, and students who are uncomfortable with systematic working find it disproportionately hard. Worked properly - write the parent genotypes, set out the cross in a grid, read the ratio off the grid - it becomes mechanical. Guessed at, it is a coin flip. The technique takes one lesson to teach and is worth several marks every year afterwards.

Both are practised weekly in our Class 9 and Class 10 batches rather than left for revision, for the same reason as always: habits do not form in the last month.

Every student explaining a process aloud in every class.

• Say it before you write it. Processes are narrated in order, out loud, before anything is written. Students who cannot say it cannot write it, and this exposes that immediately.
• Precise terms insisted on from the start. Not to be pedantic, but because the examiner will be.
• Diagrams drawn from memory every week, marked against the conventions rather than for artistic quality.
• Because, therefore, which means. Every explanation has to contain one of these, so description turns into explanation as a matter of habit.
• Genetics taught as a procedure, not as a puzzle to be reasoned out fresh each time.

Because biology marks are so often lost in the writing rather than in the understanding, this is one of the subjects where a term of focused work moves the mark visibly. It is also why we usually suggest checking written expression at the same time. Rates are on the fees page, and the assessment is free.