Ewan McIntosh links to proof that blogging can help students succeed on standardized exams. Yes, blogging - that mix of expressive, conversational, reflective writing makes writers better. It works because it transforms students into writers: "Here, the modest audience providing advice but above all the impetus to write that comes from that small and demanding audience have helped make a girl do more work and reflection than she would have done otherwise." (Ewan McIntosh)
Writers need readers and classroom blogging can be a perfect environment in which to turn passive students into active communicators.