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September 10, 2026
Last updated: July 2026
A smaller preschool is not automatically the better choice, but the research on group size and staffing ratios in early childhood education points in one direction: fewer children per educator, and fewer children overall, tends to mean more responsive care, closer relationships and steadier consistency for your child. That combination is what the evidence keeps pointing to. It's linked to secure attachment, stronger language development and better school readiness. Size alone doesn't guarantee any of it. A "small" centre that's understaffed or that rotates educators constantly gets none of the benefit, and a larger centre that genuinely keeps its ratios tight and its staff stable can still do right by your child.
So the real question for a Castle Hill family comparing options isn't whether bigger or smaller wins as a rule. It's whether a specific centre, whatever its size, actually delivers on ratio, relationships and consistency once you look past the enrolment number on the sign. Below: what the research actually says about group size, what's worth checking on a tour regardless of how big or small a centre is, and how Kings Road Long Day Preschool has stayed deliberately small since 1989.
For how to choose a preschool that suits your child more broadly, covering fees, curriculum, staff and location too, see our complete Castle Hill preschool guide.
A centre's size is really two separate things: how many children are enrolled in total, and how many children each educator is responsible for at any one time. NSW's National Quality Framework sets the second one as a legal minimum, currently one educator to every ten children aged three up to preschool age (1:10), and ratios are calculated across the whole service, not room by room. That detail matters more than it sounds. In a large centre split into several age-based rooms, your child's own room might look intimate on paper while the service around them, in the corridors, the playground, the pickup queue, involves dozens more children and staff they barely know.
The Hills District has plenty of variation here. Some approved services are small, single-group operations; others run across several rooms with a much larger roster of staff. Total enrolment, not just the ratio in one room, is a reasonable guide to how many new faces, routines and physical spaces your child has to navigate in an ordinary week.
The research points the same way, consistently if modestly. The most detailed evidence comes from the NICHD Study of Early Child Care, a US longitudinal study that followed more than 1,300 children from birth to age seven. Centres with smaller group sizes and lower child-to-adult ratios had staff rated as more sensitive, more responsive and more cognitively engaging, and children in centres meeting more of the recommended guidelines on ratio, group size and staff qualifications showed stronger language comprehension, better school readiness by age three, and fewer reported behaviour problems.
It's worth being honest about the limits of this. The effects were consistent but modest, and family characteristics, particularly a parent's own sensitivity and involvement, predicted a child's development more strongly than any single child care factor did. A 2022 systematic review in Campbell Systematic Reviews reached a similarly careful conclusion: smaller groups and lower ratios do appear to lift the quality of adult-child interaction, but there are still surprisingly few rigorously designed studies isolating group size on its own. Treat "smaller is better" as a reasonably well-supported tendency, not an iron law.
A number on a form doesn't tell you whether your child will be known. StartingBlocks.gov.au, the Australian Government's own guide to choosing early learning, puts relationships at the centre of what a quality service looks like: educators who are familiar to your child and family, who talk with children right through the day, and not only during structured activities, and who build the kind of security that lets a child relax into play and learning. That's the practical version of what the research is measuring. A smaller centre makes this easier to deliver day to day, simply because there are fewer children for each adult to hold in mind, and fewer staff rotating through your child's week.
Consistency compounds the effect. A child who sees mostly the same few adults across a year tends to settle faster after drop-off, communicate needs more confidently, and build the kind of secure base that lets them explore rather than just cope. A larger service can offer this too. It just has more scale to manage to get there.
Whatever size a centre says it is on paper, the details worth checking are the same. On a tour, ask:
A large centre that answers these well can still be the right fit for your family. A small centre that answers them poorly isn't automatically better just because the enrolment number is lower.
Sometimes, yes. Larger centres can offer wider facilities, more specialist programs and sometimes more flexibility on days and start dates simply because there are more places available. None of that is wrong for a family who values it. The point here isn't that small always wins. It's that "small" only earns its advantage when it translates into a tighter ratio, steadier faces and a team that genuinely knows every child, not just the ones assigned to their own room.
Not automatically. Smaller group size and lower ratios are linked to more responsive caregiving on average, but only when a centre is well staffed and consistent. A larger centre with tight ratios and a stable team can deliver the same relational quality.
For children aged three up to preschool age, NSW requires at least one educator for every ten children (1:10), stronger than the 1:11 that applies in most other states and territories. Ask any centre what ratio they run in your child's room.
Not necessarily. Group size and the breadth of a learning programme are separate things. A smaller centre can still run a full early years curriculum; it simply delivers it to fewer children at once.
Ask about the ratio in your child's specific room, staff turnover and average tenure, and how many different educators your child would see in a typical week. A low total enrolment number means little if staff rotate constantly or ratios are only met on paper.
Yes. Friendships depend on consistent, positive time together, not a large pool of classmates to pick from. Many children form closer, steadier friendships in a smaller, stable group than in a larger one where the mix of children changes more often.
Kings Road Long Day Preschool has stayed deliberately small since 1989, operating as one close-knit community across its Wallaby and Kangaroo classes instead of expanding into a larger, multi-room service. Staffing meets or exceeds the NSW requirement, and the team's continuity is part of how that small-by-design approach works in practice.
Being small has been a deliberate choice here since 1989, not a limitation to work around. The team is small enough that educators across the centre, not just the ones rostered to a child's own class, know each family by name. Staffing meets or exceeds the NSW requirement, and staff tend to stay, so the adults your child sees early in the year are largely the same ones they'll see later on. Children move between the Wallaby and Kangaroo classes as they grow, inside one inclusive, multicultural community built around our Learning for Life approach and Meeting the National Quality Standard, open 8am to 5pm for families who need the full working day. None of that is about being the biggest or the best resourced. It's about staying small enough that every child is known.
If you'd like to see what a small, close-knit centre looks like day to day, book a tour of Kings Road Long Day Preschool or get in touch. We're always glad to talk through whether it's the right fit for your child.
