Effective and efficient collaboration does not always happen on its own. This document includes models of collaboration and co-teaching. It also has some really excellent worksheets and planning documents for teams to use. There is a great quiz called "Are We Really A Team?"
Google Drive changed the way my school and everyone in it worked for the better. Google Docs is an amazing tool for students and for teacher-to-teacher collaboration. This article talks about Google Drive as a collaboration tool, but also offers four more online tools. Thinkbinder looks really interesting!
An excellent read for school administrators but also for teachers seeking to understand the big picture of time in schools. The quote at the start of the article says a lot, "You will never 'find time' for anything. If you want time, you must make it."