MCTS is one of the important skills to be trained during STEM and 21st-century learning. However, according to PISA 2018, students' MCTS report is still low. This research aims to design STEM-PjBL based interactive multimedia to stimulates students' MCTS. This research is a Research and Development research with ADDIE model development. The subject of this research is Sophomore High School students. The researcher is used to interview guidelines, questionnaires, tests, documents, and validation sheet as the instruments of this research. The technique of analyzing data is using description and conversion to make qualitative data from quantitative data. The developed main design results including home page, login, and the main menu that has nine options to facilitate in the mathematics learning process. According to experts' assessment, 4.78 as the average score shows that the rating category is good. Therefore, STEM-PjBL based interactive multimedia design for a mathematics learning activity to stimulates students' MCTS quality that can be continued to development, implementation, and evaluation stages.
Volume 12 | 07-Special Issue