The work in the infant school includes or amounts to thirty lessons per week while in the higher one there are thirty-six lessons. Accordingly, the pupils in the lower grades receive a minimum of three hundred sixty lessons a year, and this number may be increased to four hundred fifty or six hundred thirty. In the higher grades they have at least four hundred thirty-two lessons a year, and if the time is extended they have five hundred forty or seven hundred fifty-six lessons a year. Each rural commune has its own school board (_Skolestyret_) consisting of a priest; the chairman of the municipal council; one or two teachers[14] chosen by the body of teachers; as many other members (men or women) as the communal council deems it advisable to select; and the rectors of higher schools, if there be any, under the supervision and inspection of the school board. In the towns and cities the school board consists of at least one priest[15]; a member of the city's executive council;[16] as many other members chosen for three years as the municipal council deems it advisable to select, at least half of whom must be chosen from among parents who at the time of election have children in the city primary schools; one or two teachers;[17] and, wherever the school board controls higher schools, the rectors of such schools. The members of the school board select their own chairman and act together as a committee or board. Among its more important duties are appointment of teachers and special committees, provision of course of study with specific instructions regarding its presentation, and the estimation of sums of money necessary to meet demands in the maintenance of the schools for the year. This estimate of expenses is sent by the board each year to the communal council which has charge of the dispensing of finances for the commune. The course of study, including the plan of instruction and directions regarding the supervision of the schools as given by the board, is minutely detailed and specifically stated. It includes a list of studies to be pursued, the manner and order of their presentation, and the number of hours per week to be devoted to each subject; an outline of arrangements for entrance, promotion, and leaving examinations, with provisions for exemption therefrom wherever such is deemed advisable; all necessary arrangements for vacations; and other matters considered essential in the maintenance and carrying on of a school.