One of the many problems I have encountered in doing workshops on Web 2.0 tools this year has been the problem of Internet filtering. I know why websites are filtered - although at times it can be frustrating.

Because students are "out there" on the web when blogging - it is important to take some precautions. While you should always check with your own district policies, consider these tips from teacher bloggers:

Blogging policy and guidelines from Mathematical Musings.

Discovery Blogging Rules : A wiki that compiles the input from several teacher blogs and most importantly, was decided upon by students.

Bud the Teacher's awesome wiki with sample blogging policies, parent letters, acceptable use policies and much, much, much more.