This study aimed to develop e-module physics based Kvisoft Flipbook Maker (KFM) on the materials of harmonic motion in spring vibration material as a supporting learning material for the tenth-grade students of Senior High School. The study adapted the 4D development models (Define, Design, Develop, and Disseminate) in which the define stage was to describe problems in learning, the design stage was to produce initial products and research instruments, the develop stage was to obtain product

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... instrument feasibility, and the disseminate stage was for the widespread deployment of KFM-based Physics e-modules. The study subjects numbered 34 students in the tenth grade of Mathematics and Science (MIPA) 1 of Senior High State School (SMAN) of 1 PAKEM, samples were taken using purposive sampling. The research instruments employed were preliminary study questionnaires, material expert validation survey form, media expert validation survey form, and critical thinking skills tests. The data collection methods applied in this paper were validation, observation, pre-test, post-tests, and study of documentation. Data analyzing used was sign test. The results of the paper showed that 1) KFM-based Physics emodules developed fall into the valid category and are worth using. 2) Students' critical thinking skills during learning activities had improved significantly.