Implementing the Blended Learning model was identified as having a major influence on achieving learning objectives in the classroom. Blended learning facilitates different times and types of student learning so students can learn according to their needs. The purpose of this study is to define the blended learning effectiveness used at MTs Ittaqollah Ambon in terms of some components evaluation, that are system assessment, program planning, program implementation, program improvement, and program certification. The CSE-UCLA (Center for the Study of the Evaluation University of California, Los Angeles) evaluation model-based evaluative study was employed in this research as the methodology. The study's subjects were the students, principals, teachers, and the management team for blended learning. The research results indicated that the level of effectiveness average of the components of the assessment system was 86.6% (good category), the level of effectiveness average of the planning program components was 84.5% (good category), the level of effectiveness average of program implementation components was 89.3% (good category), the level of effectiveness average of improvement program components is 85.5% (good category), the average effectiveness level of certification program components is 85.9% (good category). The study's results can provide suggestions or recommendations for enhancing or refining the usage of blended learning in schools to maximize the achievement of learning objectives.