most primary schools are very small some twothirds of primary schools have just students or less and of these around half are singleteacher schools unidocentes for up to students together these small schools enrol around of all primary school children pen by law classrooms can accommodate between and students although multigrade classrooms can have students and singleteacher schools can operate with as little as just one student the average primary class has students much less than the oecd average of pen oecd a with students on average class sizes in secondary schools are almost double those of primary schools and above the oecd average of