What is the educational value of blogs and blogging to the 21st century learner?

I think the educational value of blogs and blogging to the 21st century learner is going to be an important resource for teachers in the near future. Blogging is a way to bring the world to the classroom. It is a great tool for not only collaboration with others inside the classroom, but you can also use blogging to bring experts from outside the classroom to contribute as well. It is going to allow for more collaboration, more student-centered learning, as well as, allowing the teacher to expand lesson plans and assessments. I believe it is going to revolutionize the education system.