Although there are some studies revealing the effectiveness of the implementation of flipped classroom, but a study investigating the feasibility and effectiveness of weblog integration during the implementation of flipped classroom for teaching civics is still scarce. This study aimed at investigating the feasibility and the effectiveness of the implementation of weblog-based flipped classroom model. This study used the combined approach (Creswell, 2012) of qualitative and quantitative. The qualitative approach was in the form of a case study design. Meanwhile, the quantitative approach was in the form of experimental with preand-post test design. The participants of this study were 42 students of Social Class of Islamic Senior High School. The data were gathered through semi-structured interview, questionnaire, and test, i.e. pre-and-post test. The qualitative data were analyzed descriptively; and the quantitative data were analyzed by using paired sample t-test formula. The results revealed that the implementation of weblogbased flipped classroom is feasible and applicable. Furthermore, it has been statistically proven that it is effective to teach civics indicated by the raise of students' achievement in civics. This study implies that innovation of technologybased learning has great influence in students' achievement and this should be taken into account by the related parties.