In its early stage, the school was small-scaled, comprising only 3 classes and 111 students.

The Boys wing comprises seven classes which start from 6th grade to 10th grade.

The Environment comprises three classes of tools - system modelling, application building, and end-user.

The school has 35 classes with each form comprising 7 classes.

It comprises four classes, two of which are awarded in two grades.

The school comprised 6 grades and 3 classes, some 100 students and 6 teachers.

The Order comprises five classes, in descending order of seniority :

Baltimore and Ohio Class S comprised two classes of 2-10-2 locomotives.

The Order originally had only one class (Companion), but expanded to comprise two classes in 1887.

Levels of education comprised 10 classes from the first to the tenth.