The importance of signing in and signing out cannot be over-emphasised. Should there be an emergency in school it will only be possible to account for students whom we know are in school. Similarly we would not want to waste time looking for a child who is not in school. Unless children are responsible and make sure that they follow the signing in and out rules, a tragedy could occur. On a less dramatic note, if students do not sign in then you could be bothered by endless calls from the automated call service!