Efimova (2008. p. 208)
But how many do it? Ask around in your tutor group. I doubt the figure gets above 5% unless it is compulsary and then I doubt that more than 50% post more than three times during the course of module - a minimum requirement.
Efimova, L. (2009) Passion at work: blogging practices of knowledge workers. Novay PhD Research Series 2009 (www.novay.nl.dissertations)