The current study aimed to make students discover the multidimensional structure of Socio-scientific Issues (SSI) using the SEE-STEP model. Nine-step module has been designed to help students' discover the aspects of the SSI in the implementation process of the research. This research was based on qualitative methodology in determining the study group, the SSI in question, data collection tool, application process, and data analysis. The sample of research consisted of 24 (13 girls and 11 boys) seventh-grade middle school students. The current research findings indicate that during the decision-making process, the students mostly refer to decisive values, followed by decisive knowledge and personal experience, respectively. Also, it has been found that students mostly base their hard core (HC) reasons and (positive heuristic's) PH's generally on the aspects of economy and environment, and that they made up no HC reasons in the aspects of technology and ethics. Based on these findings, it is seen that most of the students who participated in the activity liked the nine-step module.