Expressing a reaction through writing is difficult especially in primary grades. The elementary level needs to improve their writing skills to be able to express their viewpoint towards the story. The objective of this study is to improve the learner's writing a reaction from story read. This research aims to find out how the implementation of the OREO method solve the problem in writing of the learners. The respondents of the study were purposively selected which composed of thirty (30) students in Bagong Buhay H Elementary School in the Schools Division of San Jose Del Monte, Bulacan. Moreover, having conducted the pretest and posttest, the researcher found out that students were able to write a reaction from the story they've read. Furthermore, the study revealed that there is a significant difference between the pretest and posttest scores of the students in the using the OREO method as graphic organizer to write their opinion. In addition, the grade four learners' level of writing skills in terms of: focus, content, viewpoint, organization, style, and convention have a progress after implementing the method.