Development of Statistics Teaching Materials Based on Realistic Mathematics Education with Scaffolding for Junior High School Students

Background of study:Statistics learning in junior high schools still faces the problem of low conceptual understanding and problem-solving skills because the teaching materials used tend to be limited, procedural, and do not connect concepts to the context of students' lives.Aims and scope of paper:This study aims to develop statistics teaching materials based on Realistic Mathematics Education (RME) with scaffolding, assess their feasibility and attractiveness, and test the effectiveness of their use on seventh grade students of SMP Islam Purbolinggo.Methods:The study used Research and Development with the ADDIE model, which includes Analysis, Design, Development, Implementation, and Evaluation. Participants included validators, material experts, media experts, test experts, questionnaire experts, mathematics teachers, and seventh-grade students in small-group tests, large-group tests, and effectiveness tests. Data were collected through interviews, questionnaires, documentation, and essay tests, then analyzed descriptively and quantitatively, using instrument quality tests, and effect size.Result:The validation of material experts obtained an average of 3.50 with very valid criteria, validation of media experts 3.18 with valid criteria, the attractiveness test of small groups 2.75 and large groups 2.91 with interesting criteria, while the effect size of 0.80 is categorized as moderate.Conclusion:The teaching materials developed are appropriate, interesting, and quite effective for use in statistics learning in the context of this research.