Richard Byrne advises teachers to activate page-level permissions when giving students access to classroom websites for blogging or digital portfolio development (2012.05.24).
The Professional Learning Board (PLB) offers a whack of resources to parents and teachers, including this dedicated toolbar for Firefox (Windows, Mac, or Linux), which is also availablle for Internet Explorer 5.0+
The Professional Learning Board deserves a thorough exploration to see what else it has in stock for: "professional development, instructional strategies, classroom management, online teaching and learning tools, virtual classrooms, continuing ed, and school" (2008.07.30).
Tools for Educators offers free worksheet generators, printables makers and a host of programs for teachers to make resources for lessons, lesson plans and printable materials for classes.