This article aims to advocate retelling stories technique for developing speaking ability of grade 9 students in Thailand. Morrow's theory (1981) and other scholars in retelling stories technique are presented. This technique is integrated in the lesson plans following Morrow's framework. Narrative text of short stories which refer to daily life and social including pictures have been used for each lesson plan. Students are trained to work as a group using story's mind map, illustrations, and role-playing activities in class. There are three main steps of teaching retelling stories: before retelling (alternative techniques), while retelling (students' practice by using activities of brainstorming, role play, and discussion) and retelling story. The lesson plans will be piloted with 15 9th graders. This preliminary study is expected to provide an example of useful techniques in improving speaking ability, thus, it is expected to be used in other foundation English courses for Thai students.