Two great tools from the list are Google docs and Google calendar.
Google docs: allows various authors to collaborate on a document or share common documents. After creating or uploading a document, the original author can invite others to view and/or edit. As the document is edited by others, changes are noted in dfferent colors. Virtual post-its allow for comments.
Benefits:
* Principals can share pertinent documents or schedules in a common location, and teachers don't need to return to an email to access it
*Teachers or administrators in various locations can work on a single document, and there are no longer mltiple versions floating around.
*Spreadsheets can be shared and the data within them easily manipulated for class lists, post test scores, etc.
Google calendar: allows sharing and allows other to schedule on your calendar. Multiple calendars can be used and coded, synchs to smartphones.
If a gmail invitation is issued, itcan be easily added to the google calendar.
Benefits:
*others can see when the principal or other members of the staff are free for meetings, etc.
*school events can be placed on the calendar and made available to the whole staff.
* sends reminders as to email or phone for important events scheduled