Abstract
This study aims to develop an acid-base e-module, grounded in a contextual approach, as a teacher's guide for the learning process, with a focus on validity and practicality. This study is a Research and development study with a 4D research model (define, design, develop, disseminate). The test subjects were students of class XI Health at SMAN 1 Kopang, consisting of two classes, namely F1 and F2. In the define stage, interviews were conducted with teachers and students. Next, in the design stage, the e-module to be developed was planned. Then, in the develop stage, the development process was carried out by testing its validity and practicality. Finally, in the disseminate stage, the e-module was distributed to teachers and students in the form of an easily accessible link. The results showed that the validation value obtained from three validators, using the Aiken index (V), was 0.85, placing it in the very valid category. Practicality testing of the developed e-modules is obtained from teacher and student response questionnaires. The average percentages of e-module practicality among teachers and students are 89.92% and 80%, respectively. Based on the data, it can be concluded that the e-module for teaching acid-base, developed using a contextual approach to the Merdeka curriculum, is feasible and practical for use in the learning process.