Don't worry. They really aren't as bad as you think. The build up is far worse than the actual two days. I even ended up enjoying my last one! This time we knew in advance what lessons we would be observed on but we were also aware they could drop in as their plans may change according to what they have seen etc. In my first one they never let you know in advance so I guess different inspection teams do it in different ways. They may not tell you which lessons so be prepared for a drop in at any moment. Have your planning on a chair for them. How detailed it needs to be often depends on your headteacher so it's worth checking with them. We were told to plan in a little more detail but not to change how we would normally teach things. Our deputy head checked our plans to see that she was happy with them. They interviewed subject leaders but it wasn't a big deal. A quick few minutes and it was more about how the senior management helped us to do our jobs better. A few pieces of advice: 1. They are not necessarily looking for 'wow'. They are looking for kids learning something and moving their learning forward. Good clear explanations, quesitoning and modelling i.e. good teaching. 2. Keep your door open. There is nothing worse than wondering when it'll open! 3. Keep on top of things like assessments and displays from now as you won't have much advance notice of them coming in. 4. Mini plenaries to reinforce learning objective and point out good things you've seen. 5. Push your higher ability groups. 6. Keep a stash of new stationary so that you can get it out the day before Ofsted come so there is no fuss with unsharpened pencils etc. 7. Don't plan 'wow' stand alone lessons. They are looking for good teaching and lessons designed to impress will do the exact opposite!