My testimony presents a description of an in-class flip lesson plan that uses VoiceThread videos, and which was applied in two different courses of the Academic English Program at the University of Los Andes. First, I provide a general overview of the teaching context. Next, I describe the pre- and in-class activities. Then I present my insights and perceptions about the teaching interaction dynamics and learning culture, which shifted from teacher-centered to student-centered and thus generated a radical change in my students’ attitude and behavior. Subsequently, I explain some aspects to be considered for future practices. Finally, I provide an overall conclusion.