Discussion of Blogs with students

The main reason I am blogging is because of a book study I am currently enrolled in. I showed my kids (freshman and sophmores) a video about technology in the classroom. I asked them 4 questions. 1. What makes you think. 2. What do they think a blog is, and have you ever used a blog. 3. How can you teach someone to think. 4. How do you think teachers can better utilize technology in the classroom.
I am putting these questions out to the blogging world. (Obviously you know what a blog is, because you are here, but tell me how you use it)
Maybe I will get some comments, maybe I won't, but we shall see.