Here is an interesting presentation, titled 11 Advantages of Using a Blog for Teaching by Frank Calberg, a strategic inspirator from Zurich, Switzerland.
This blog that I have created has been a way for me to teach to the many people who I will not be able to come face to face with because of distance and time. For example, I had an average of 350 views of this blog just in the month of June. On average, I meet with about 20 people per month in person or via email to help them with their literature searches. So the fact that I can teach that many more people through this blog is a testament to the power of using a blog to disseminate knowledge farther and wider.
If you have never created a blog and want to play around with how to create and use them, you can start with Blogger, which is free. There are other alternatives such as Wordpress or Typepad. If your institution already has purchased blogging software, contact your administrator to find out about using it.
Using a blog to teach can be a fun, interactive, and dynamic tool for you to consider using in your role as a teacher.