Validation of mathematical teaching material's developed by project-based learning integrated STEM

Abstract

The development of mathematics' teaching material using project-based learning integrated with science, engineering, and technology (STEM) is a new thing to do. In its development, teaching materials through two series, namely the preparation and development then validation of teaching materials that have been developed. This research was conducted to determine the validity value of mathematics teaching materials based on project integrated with STEM. The data of this study were obtained from the assessment of mathematicians who acted as material experts and media experts to determine the face validation, content validation, and construct validation. The validation by 36 junior high school students was conducted to find out the value of content validity in each part of evaluation to ensure the learning objectives could be achieved. The results of the experts judgement and 36 junior high school students can be concluded that the teaching materials being developed have a high value of face validation, content and constructs. Based on these results, mathematics teaching materials that are developed feasible and valid for use in a broad scope of research or furthermore are worthy of being used in the learning process of teaching mathematics on appropriate topics.