I had the SAME thought the first day of school. It’s awful talking AT them. My idea for next year – DO something in class. Have them introduce each other to the class (short, factual). Then, flip the “lecture.” Or, have the flip ready, and they work in class the first day. So you’re on hand to model good flipping routines and teach them how it can be collaborative. Even it’s a video on what the flipped classroom is. Good luck!