The purpose of education guides the purpose of teaching, and the purpose of teaching must obey the purpose of education. Usually, the purpose of education should be transformed into the purpose of teaching, and the needs of society should be concretized into the needs of teaching subjects. It reflects the requirements of a certain society for the educated, is the starting point and ultimate goal of educational work, and is also the basis for determining educational content, selecting educational methods, and checking and evaluating educational effects.

Subsystem is a model element, which has the semantics of package (which can contain other model elements) and class (which has behavior). The behavior of a subsystem is provided by its contained classes or other subsystems. A subsystem implements one or more interfaces that define the behaviors that the subsystem can perform.

The teleological view of social-based education holds that individuals live in society and are subject to social environment, so we should pay attention to the social value of education from the needs of social development.