1. publication of a book written in a textbook style. Used to study in the system of school-based curriculum.2. publications written in such a way the lesson finished, so it is easier to study by ourselves. It is suitable for use in distance education, in combination with other media such as tv, audio tapes, and supplementary lesson summaries, etc.3. supplementary teaching materials such as study guides, etc., practice may be shared with the media person or other mass media.4. the regular publications, such as magazines, newspapers, etc., with columns or articles, helpful instructors may recommend the participants to broaden their knowledge or to adopt a unified research references.As the concrete knowledge in order to enhance the experience. Make the students understand the events of the story, or something that is abstract., animal life or image series, a series that ceremony the first Lord nangkhan na gifts etc.
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