The rural communes are divided into school districts or circles (_Skolekredser_). Each district supports and maintains a primary school with at least two divisions--an infant school (_Smaaskole_) for children from seven to ten years of age, and a higher one designed for children from ten to fourteen years of age. In districts where distances are great or roadways difficult, two or more infant schools are provided. Companies operating one or more manufacturing establishments or industrial concerns, and generally employing thirty or more laborers, are required to provide a primary school for the children of the men in their employ. When once started these schools are to be kept up unless the number of the employed is reduced below twenty. In case there are other children who desire to attend such school, they shall have the right to do so providing it does not interfere with the instruction of those for whom the school was established. In return for this the school treasury receives from the communal treasury a yearly amount proportioned to the total cost for all pupils in the school.[11] While the law requires that instruction shall be provided six days in the week for at least twelve weeks each year, it also grants to the communes the privilege of extending the time to fifteen weeks.[B] It further provides the right to maintain six weeks additional, voluntary instruction each year.[12] These privileges are generally taken advantage of by both communes and pupils. The communes desire the extension of time for school, and the pupils are very glad of the opportunity to attend the extra time, even though their presence is not compulsory. In fact the compulsory education law has been so rigidly enforced for so long a time that regular attendance has become habitual, and the exact provisions and requirements of the law are rarely thought of by the pupils. There is, in reality, no law requiring children to attend the schools provided by the state, but a certain amount of education is obligatory. It is mandatory that schools be maintained in all of the districts, but individual children may receive their instruction in private schools if they choose, so long as educational requirements are met from year to year. Pupils who belong to the schools are required to be in attendance regularly, and children who receive instruction elsewhere than in the state schools must meet the requirements calculated to bring them to a certain educational standard by the time they are fifteen years of age. Failure in this subjects parents, guardians, and those providing schools for children of laborers in their employ to fine or imprisonment.[13]