Abstrak
<p><em>The research was conducted since the materials for writing do not fulfill the need of the studenst. This was the cause why the students have low ability in writing.therefore,the material needed to be developed by using strategy graphic organizer.the aim of this research was to produce valid,practical and effective writing material of exposition text.The was research and developing by adopting plomp design which consist of three stages. They are,need analysis (preliminary stage),prototype stage and asseement stage. The data for validity test was obtained through material validation.practicality was taken from observation sheet about the implementation of lesson plan, questionnaire about students and teacher respon and interview with students and teacher.the effectiveness was been through the activity of the students writing process and learning result. The data was analyzed descriptively. The validity test shows that writing material for exposition text is valid. Observation,quesionarie and interview result shows that the material is practical.the effectiveness test shows that the activity of the students is very good. Based on those result it can be concluded that writing material for exposition test using graphic organizer grade 4 is valis,practical and effective.</em></p>