The study aims to create a 3D model “PlasmaMesh” as a teaching aid for plasma membrane-related subtopics in Form Four (4) Biology. The research objectives are to develop a 3D model PlasmaMesh as a teaching aid with high validity and to determine the perceived usability of the product developed. This research is Developmental Research Design (DRD) guided by the ADDIE model guided throughout the product development process. The research utilized two instruments: a validity evaluation form for experts to validate and a perceived usability questionnaire for respondents to provide feedback. The validity of the product was analyzed by Content Validity Index (CVI). The I-CVI for the product analyzed was 1.00 for each item summing up for a total of 16 items, value interpreted was located in the range of 1.00 for three experts’ validation. A pilot study was conducted to access the reliability of the research instruments, measuring methods through Cronbach’s Alpha, yielding a .....

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