They are only installed in large halls because making holes affects the floor of the building, and chairs must be equipped for installation upon request.
The capacity of each semester is determined according to the area of the hall, with enough space for each student while not conflicting with safety regulations in the hall.
Stickers or glue should not be attached to whiteboards, as they leave stains after their removal, causing damage to the writing surface on the whiteboards.
The blackboard is provided according to the available space for installation in the classroom so that its presence does not hinder any other educational supplies in the hall.