Some of these purposes are to show learning, to learn writing, to communicate, to express the self, and to create. I think that all these purposes are important to incorporate into the classroom environment. While the first two are basically methods of displaying skills, the last three strive to encourage thoughtful, personal, and analytical relations. In developing writing skills, James Britton has offered a method of assessing skills. His method involves a model that highlights three skills used in communication.
Poetic language is contemplative expression.
This type of language works to accomplish a given goal. It is audience-centered and purpose at its core. I think that this is a good method to keep in mind when I am trying to teach my students writing. Advancement and personal achievement occurs with practice, which expands their range of writing. A writer who can write wonderful transactional pieces but does not know how to use poetic language is not a complete writer.