Anyone can VIEW this calendars, but you cannot edit them without authorization. Once you've received this authorization, you MUST BE logged into Google using the same email address given to the administrator to set up your authorization. Then you can edit by clicking the Google Calendar icon at the bottom of each calendar (calendar plus en GB) You can also view these calendars right in Google. To add an event, merely click on the time slot you want, then add your details to the popup that will appear.