Google Calendar

 

Easily schedule lessons and meetings
Overlay multiple calendars to see when people are available - a great way to manage staff schedules, for example. Google Calendar sends invitations and manages RSVPs.


Integrated with your school’s email
Google Calendar is integrated into Gmail and interoperable with popular calendar applications.


Share with classes, teams and clubs
Calendars can be shared school-wide or with select colleagues. A range of sharing permission controls help maintain security and privacy. 

http://learn.googleapps.com/calendar