In Spain we use the expression "linea 2" to describe a school that has two classes for each grade. Thus a Primary Education school which is "linea 2" would have 12 class groups as there are 6 grades in Spanish Primary Education. The same rule is applied for "linea 3", "linea 4" and so on. Does anybody know an equivalent English expression? I have searched the Web with no success. Thanx in advance. Salud!