The Benefits of Smaller Class Sizes: What the Research Says

When choosing a school in Cambodia, one question parents often ask is: “How many students are in each class?” While larger schools may seem more impressive, the benefits of smaller class sizes are well-supported by decades of international research—and the results are clear: students in smaller classes tend to perform better academically and socially.

In this article, we explore why class size matters, what the research says, and how it can influence your child’s educational experience in Cambodian schools.

What Counts as a Small Class?

While there’s no exact number that defines a “small class,” most experts agree that:

• Small class = fewer than 20 students

• Medium class = 20–30 students

• Large class = over 30 students

In Cambodia, class sizes vary widely depending on whether the school is public, private, or international. Many international and boutique private schools prioritize small class sizes, while public schools often face challenges with overcrowding.

1. More Individualized Attention

In small classrooms, teachers have more time to work with each student. This means:

• Quicker identification of learning difficulties

• More tailored instruction based on the child’s level

• Frequent feedback and encouragement

For students who need extra support—such as English language learners or those with learning challenges—this attention can make a major difference.

2. Improved Academic Performance

Studies from the U.S., U.K., and Asia have consistently shown that students in smaller classes:

• Score higher on standardized tests

• Have better reading and math outcomes

• Show faster academic progress in the early years

These gains are most significant in the early grades (preschool to Grade 3), when foundational skills are being built. In Cambodia, where students often speak multiple languages or start school with varying readiness, small classes help teachers close gaps early.

3. Stronger Relationships with Teachers

Small classes allow teachers to truly get to know each student—not just academically, but emotionally and socially. This leads to:

• Better classroom behavior

• Higher levels of trust and communication

• A safer, more supportive learning environment

Children who feel known and understood are more likely to take risks, ask questions, and stay engaged.

4. More Participation and Confidence

In smaller groups, students are less likely to get “lost” or stay silent. They’re more likely to:

• Participate in class discussions

• Express their thoughts and ask for help

• Develop leadership and collaboration skills

Shy or introverted children especially benefit from an environment where they aren’t competing with 30+ peers for attention.

5. Better Classroom Management

Teachers in smaller classes spend less time on discipline and more time on teaching. With fewer students:

• Transitions are smoother

• Disruptions are easier to manage

• Students receive quicker help when off task

This leads to a calmer classroom and more instructional time overall.

What Parents Should Ask Schools

If you’re considering a school for your child, ask:

• What is the average class size?

• How many adults (teachers or assistants) are in each class?

• How does the school support students who need extra help?

Smaller class sizes don’t guarantee success on their own—but when paired with well-trained teachers and a strong curriculum, they create an ideal environment for learning.

In Cambodia’s evolving education system, choosing a school with smaller class sizes can give your child a stronger start. From academic growth to emotional wellbeing, the research is clear: when it comes to classrooms, smaller really can be better.

If the information about the school is not accurate and insufficient, Contact us.
Do you want to register your school? Click here.