My son is ten and he hasn't covered sex education yet at his school. A few months ago in year 5, they watched a video with the school nurse but it covered puberty rather than sex. We managed to view the video at home first so I would know what they would be discussing first, it was basically changes to the body through puberty rather than sex but covered girls periods and why they have them. Personally I think it ridiculous to even think about discussing it with 5 year olds, shouldn't they be concentrating on learing to read? I though 8-9 a good time to discuss puberty and 10-11 a good time to discuss sex, perhaps its me being old fashioned though.