This article bases on the theories of organization of writing, literary work, and discourse analysis to analyze textbooks for elementary school and devise assignment of writing which involves the logical structure of textbooks by "Text- Based" and reading-writing interaction. It will help students to exercise the methods of organization of writing from reading to writing. The study is subject to the categories of the general and the specific, now and past, the positive and the negative. In accordance with the pattern of new-style writing, the author creates teaching materials for students to do the writing exercises, then reviews. Therefore, it is concluded that teachers can arrange teaching materials for reading and writing uniformly. Besides, such teaching of reading-writing interaction will help pupils to learn the methods of organization of writing.