Small class size is the most overused phrase in private school marketing. Every school claims it. Few define it. Here is what the research says — and what we see every day.
The research is clear: below 20 makes a measurable difference. The landmark STAR study (Tennessee, 13,000 students, 4 years) found that students in classes of 13–17 significantly outperformed those in classes of 22–25.
The difference is not just academic — it is relational. In a class of 30, a teacher has approximately 90 seconds of individual attention per student per hour. In a class of 18, that triples to over 4 minutes.
At Prestige, we cap every class at 18 students. In kindergarten, the ratio is 10:1. This is not a marketing number — it is a pedagogical commitment. We believe that a child who is known is a child who can be taught.
What 18 students looks like in practice: Every teacher knows every name by the end of the first week. Quiet students get called on — not because they raised their hand, but because the teacher noticed they had something to say.
Ask any school: what is your MAXIMUM class size? Not average. Maximum. Then ask what happens when enrollment exceeds it. At Prestige, if we reach 18, we open a second section. We do not squeeze in a 19th desk.