Art. 3. In each one of the villages of those provinces, there shall be at least one school of primary instruction for males, and another for females, in which education shall be given to the native children and Chinese of both sexes. The regulations shall determine the proportion of the increase in the number of schools for each village in proportion to its population. In all the schools there shall be a Sunday class for adults. Art. 4. The instruction given in said schools shall be free to the poor. Attendance on the part of the children shall be compulsory. Art. 5. The schools for males shall consist of three classes; to wit: entrada [i.e., entrance]; ascenso [i.e., promotion, or intermediary]; and termino [i.e., final], of the second class, and termino of the first class. They shall be supplied with teachers graduating from the normal school in accordance with the qualification which they shall have obtained at the conclusion of their studies, their promotions depending upon their seniority and merit combined. The schools of termino of the first class, namely, those of Manila and its district, shall be supplied with teachers by competitive examination among the teachers, with the certificate from the normal school, with experience as teachers. Art. 6. Classification of the schools, in accordance with the preceding article, shall be made by the superior civil governor, [21] after consultation with the superior commission of primary instruction, and after the report of the chief of the province. Once the respective classification is fixed it can be changed only in the same manner. Art. 7. The teachers shall enjoy the salary and other privileges prescribed by the regulations. [22] Said salary, as well as the foundation of the school, acquisition, and conservation of school supplies and equipment, and the rent of the building where there shall be no public building, shall constitute an obligatory expense on the respective local budget. Art. 8. In the villages where the superior civil governor so decrees, as its small population so allows, the teachers shall fulfil the duties of secretaries [23] to the gobernadorcillos, enjoying for such duties [concepto] an additional pay proportioned to the local resources. Art. 9. The teachers appointed from the normal school cannot be discharged except for legitimate cause and by resolution of the superior civil governor, after a governmental measure drawn up with the formality set forth in article 6, and after hearing the interested party.