This document discusses flipping the classroom approach for CELTA training. Traditionally, trainees receive input in class and then do practice activities, but with flipping, trainees watch video input before class. This frees up class time for more hands-on practice and discussion. The author trialled this by creating 15 minute videos for trainees to watch on vocabulary and grammar from the day's lesson. In class, they could then focus on analyzing language and completing a language assignment. Trainees reported finding the videos beneficial for preparing and revisiting lessons at their own pace. While it requires more work from tutors, it keeps trainees more engaged by mixing up the routine and delivering content in bite-sized chunks.