Don’t overthink It! In my early teaching days, I often made the mistake of securing the tablet trolley, printing QR codes, planning oodles of group work and hoping to dazzle the observer with a song and dance of a lesson. It should come as no surprise that this stuff often went wrong. The tablets weren’t properly charged. The QR codes wouldn’t scan and the group work often fell flat. Don’t do anything that you wouldn’t normally do for an observation. It’s disruptive for you and it’s disruptive for the students!