This study aims to increase students' interest in learning by developing web-based learning for fourthgrade students at SDN Klender 04 East Jakarta. In addition, website-based learning was developed to create interesting learning so that student interest in learning during a pandemic like this can increase. This research is research and development which consists of 10 steps of activities. The subjects of this research were 29 students consisting of 3 students for individual trials, 9 students for small group trials, and 29 students for field trials. The instruments used in data collection were media expert validation sheets, material experts, validation by high school teachers, and response questionnaires for students. Analysis of the data used is descriptive statistical analysis. the results of the media expert's validation showed an average score of 4.6 which was included in the very good criteria. The validation results from material experts showed a score of 4.65 in very good criteria. The increase in students' interest in learning from 51.5% to 81.1%, an increase of 29.6% stated that this development product was appropriate to be used as a learning resource that could increase students' interest in learning.

Keywords : Web-Based Learning, Science, Website.