This is an example of a password protected communication page. Note that this takes a bit longer to set up. It can defeat the purpose of trying to make lessons and past work easily accessible. However, if it is a choice between convenient online sharing for you as a teacher and a one stop shop for students and parents it may be worth have the added level of security. Be ready to share the password out. Note this is in no way bank level security. Teachers should still not be posting student personal or private information.