Why Class Size Matters in Early Years

Class size sounds like a boring number on a brochure. In reality, it is one of the highest-impact variables in a child's school experience — especially before Class 5. The difference between a class of 22 and a class of 38 is not just a number. It is whether your child gets noticed.

What research shows

Meta-analyses of class-size studies across the US, UK and India consistently find that smaller class sizes (under 25 in primary years) lead to better attainment, better social outcomes and lower teacher attrition. The effect is strongest for children with reading or behavioural difficulties and for children whose home language differs from the medium of instruction.

What changes when class size goes up

• Individual attention falls — a child can go a whole week without one-on-one conversation with the teacher.
• Discipline takes more time, leaving less for actual teaching.
• Classroom noise rises, making focused work harder.
• Group work splits into larger groups, so each child contributes less.
• The slowest and the fastest children are equally underserved.

Recommended class sizes by grade

1. Pre-KG and LKG — under 20.
2. UKG and Class 1 — under 25.
3. Class 2 to Class 5 — under 28.
4. Class 6 to Class 8 — under 32.

Class size at Yajur

Yajur Public School caps Pre-KG at 18, LKG and UKG at 22, and primary sections at 28. We have refused to expand class sizes even when admission demand has pushed us to. Our reasoning is simple: a Pre-KG of 32 is no longer Pre-KG — it is crowd control.

The teaching assistant factor

Headline class size hides a second variable — whether there is a teaching assistant in the room. A Pre-KG with one teacher and 22 children is very different from a Pre-KG with one teacher, one assistant, and 22 children. The second is functionally a 1:11 ratio. Always ask whether the class has an assistant and what their qualifications are. Trained assistants are an enormous asset in early years.

From Class 3 onwards, the assistant role typically tapers off. But specialist teachers — for music, art, PE, library — should be increasing. By Class 5 a child should be experiencing 6 to 8 different teachers across the week. Class size in each of those periods matters as much as the homeroom class size.

Beware mid-year additions

Schools sometimes admit children mid-year to fill seats. A class that started at 25 in April can creep to 33 by November. Ask schools their policy on mid-year admissions. The best schools cap classes at admission and refuse to over-admit even if revenue would benefit.

What good Pre-KG looks like in practice

A well-run Pre-KG with fewer than 20 children typically has the teacher on the floor, talking to children at their height, supporting independent activities, sometimes reading to a small group, sometimes guiding individual work. The atmosphere is busy but calm. Children rarely wait long for adult attention. Transitions between activities flow because the group is small enough to redirect.

A Pre-KG of 32 looks very different. The teacher spends most of her energy on group management. Activities tend to be uniform — everyone does the same thing — because differentiation is impractical at that scale. The quiet children disappear. The loud children dominate. Many parents do not realise this trade-off until their second child, when they pick a smaller setup and see the difference.

Class size and teacher retention

Smaller classes are easier to teach. Teachers in well-sized classes stay longer. Teacher turnover is one of the hidden costs of large classes — children form a bond with a teacher, the teacher burns out, leaves at the end of the year, and the child starts again. Ask any school how long their primary teachers have been with them. Stability is a strong indicator of a healthy environment.