To counter traditional teacher-centered classes, Taiwanese educators are advancing innovative methods of teaching English. This study compared a control group with an experimental group that experienced a flipped classroom approach, using digital content and in-class activities. The content for both groups included pronunciation, vocabulary, and sentence patterns, in addition to a major project, Taking Taiwan to the World, which used the Postcrossing web app. The results were statistically significant, demonstrating that the flipped classroom reduced learning anxiety, while increasing learning interest and effectiveness, as well as overall higher academic achievement.