Purpose: This research aims to investigate: (1) students' needs for a web-based Multimedia Learning Management System (MLMS) in high school physics learning, (2) designing a prototype model for developing a web-based Multimedia Learning Management System (MLMS) in high school physics learning, (3 ) the validity of the web-based Multimedia Learning Management System (MLMS) development model in high school physics learning, (4) measuring the practicality of the web-based Multimedia Learning Management System (MLMS) development model in high school physics learning, and (5) the effectiveness of the Multimedia Learning Management System development model (MLMS) web-based in high school physics learning.

Research methodology: The research method applied was research and development using the one-group pre-test and post-test design (ADDIE) model. The object of this research was high school students, with samples taken from four schools (three private schools and one state school) in South Tangerang.

Results: The assessment results for static electricity material at schools I and II were in the medium category, with gain value of 0.64 and 0.63, respectively, while at school III, they were in the high category with a gain value of 0.70. Statistical significance (school I, school II, and school III) in Static Electricity shows t < 0.05, while in dynamic electricity material, schools I and II are in the high category, with the same gain value of 0.7 and a significant level t-test results t < 0.05.

Implementation: The material expert validation results showed a validity level of 90.91% (very good), whereas the multimedia expert validation results reached 83.75% (very good). Professional physics teachers gave positive responses, with a material and multimedia acceptance rate of 84.82% (very good), whereas student responses reached 79.98% (very good). Effectiveness based on improving student learning outcomes was measured by providing pre-tests, treatments, and post-tests (One Group Pre-test, Post-test Design) using the N-gain value.