Why? I ask myself? I have a lesson observation later in the week. My lesson is planned. It ticks lots of boxes that Estyn would be looking for if they were in. It matches up with the school planning and the NC. It isn't differentiated by different activities, but is differentiated in many other ways (use of equipment/mixed ability to support each other/thinking skills and Afl to support etc) has plenty of scope for key skills. My behaviour management may not be the tightest in the school, but it is sound and my class do plenty of work and make progress. I'm still on edge about it. The kids are an unknown quantity. You can never judge exactly what they will do or how they will cope with a concept. This is the part of the of the job that makes it interesting and always different, but that also makes it nerve wracking for observations.