The way I see it is if you are up to date with all your work then a short while on the net is not an issue. At the school where I work the internet is online all day from 8am until 5pm. Obviously I can't use it for personal use when the children are there but in breaks I see no problem and would not be happy for anyone to read anything I should write or read. There is a net nanny in place and I have no objection to a record of sites visited being kept but not content of e mails etc. Of course if you are using the net instead of working or if it is costing your employer money that would otherwise not be spent then he has a right to question your use of it