Blogs can supply useful material for discussion within units of work between teacher and students, giving opportunities to express opinions and give constructive responses to work being studied.
As a Music teacher, students often seek advice about learning an instrument via a tutor outside of school. I would be able to recount in a blog my personal experience of learning to play the piano over many years and the endless hours of practice and commitment involved in reaching a competent level of expertise. Given the cost involved in purchasing an instrument and the subsequent tuition fees, my blog may significantly influence their decision to pursue such an initiative.