What am I doing writing a blog?

I am sitting here shaking my head at my audacity in setting up a blog. I am not a technophobe, but I am also by no means a "pioneer." In the case of blogs, in particular, I have not really seen the point. It seemed like an ideal opportunity to exhibit self-promotion, and I didn't really see the purpose in that. However, I have recently visited the blogs of two other math educators who focus on children's learning with meaning and I actually really enjoyed reading and exploring the blog. I thought it would be a nice opportunity to continue a dialogue, particularly with my former students. This is all quite new to me. I'm not quite sure how it will turn out. I imagine it to be a place for pondering intriguing ideas and pointing people to links that may be of interest. My hope is that it might be one of several sources available to current and former students. Initially, my focus will be on mathematics. If all goes well, I will extend the focus to include science instruction as well.