Starting to get stressed about my lesson ob by HT tomorrow. Not being very rational, I get anxious about things generally. I'm going over and over it in my head and it's becoming counter productive. I've been teaching 12 years and I always get 'good' or 'good with outstanding features', but I'm in a new year group and I had a slight difference of opinion with the HT last term so I'm worried! Just need to relax really...