Abstract: This study investigates the effect of sunbeam composition method on student's participation in Hormozgan guidance schools, one of the provinces of Iran. Since participation is known as a democracy index, this study aims to investigate whether the application of this method can help students to increase their classroom participation. The sunbeam composition method which is proposed by the literature course book compilers is performed in two ways in guidance school composition classes. The main focus of this approach is on students’ participation. Although, students participate individually, the initial aim is cooperating and working in groups. The results revealed that the application of sunbeam composition will increase students’ classroom participation and consequently develop democracy in education. Through this investigation, we also concluded that the application of sunbeam composition method not only develops students’ participation as a democracy indicator but also has an effect on other democracy indexes.