For charter, philosophy supplied the ideals that were to sever as objectives and standards. He noted that the curriculum could contain both primary and derived subjects. Primary subjects were those directly required by a particular occupation. For example, a meteorologist must fill out various types of reports. Therefore, report writing is a primary subject for all students to experience in English classes. Meteorology requires a knowledge of physics and mathematics, which are derived subjects, “service subjects which are important not because they are directly useful in the performance of activities , but because they are derived from material which has practical service value.”