Blackboard E-Learning System has been utilized by many top schools in the Philippines. The purpose of this study was to evaluate Filipino high school students' acceptance and satisfaction of Blackboard E-Learning System by utilizing an Extended Technology Acceptance Model (ETAM). 8 latent variables were utilized in this study: Perceived Ease of Use (PEOU), Perceived Interactivity (PI), Attitude (A), Actual Use (AU), Perceived Usefulness (PU), Feature (F), Behavioral Intention (BI), and Satisfaction (S). An online questionnaire was conducted at Senior High School Mapua University and a total of 200 respondent data were analyzed. The results indicated that AU is the most significant factor affecting S, followed by F, PU, PEOU, A, and PI. This study is the first study that investigated the Blackboard acceptance in the Philippines. The results would be very beneficial for educators, IT engineers, and even policymakers.