Section 4(1)(a) in The Delhi School Education Rules, 1973
(a)(i)pre-primary schools, that is to say, schools imparting education below the primary stage,(ii)primary schools, that is to say, schools imparting primary stage of education, whether or not in addition to any education below the primary stage,(iii)middle schools, that is to say, schools imparting middle stage of education, whether or not in addition to any education below the middle stage,(iv)[ secondary schools, that is to say, schools imparting secondary stage of education, whether or not in addition to any education below the secondary stage. [Substituted clause (iv) Clause (a) Substituted the Delhi School Education (Amendment) Rules, 1990 (w.e.f. 23.2.1990).](v)senior secondary schools, that is to say, schools imparting senior secondary stage of education, whether or not in addition to education below the senior secondary stage].