To all those who just don't get it!

*Scenerio for you* If a child was going into school as a boy (say 8 year old) let's call him Sam. Then say six months later he turned around and said he wanted to dress as a girl and be called Sarah. All his friends and peers have ONLY ever known him as Sam. Now you tell me how a school/ teachers then explain that to a classroom of 30+ children who are 7/8 years old? Then to a school of say 600 children who have 4/5 years olds in reception? WITHOUT causing confusion??? Love to hear how anyone here questioning my concerns, would tackle that situation to ensure EVERY child can FULLY understand how, why, Sam has changed!?