"As an alternative to the new 'Public Profiles' (formerly called 'Pages'), these additional settings allow you to pick and choose which parts - if any - of your private Facebook profile are available for anyone to see. According to a company blog post, this means that now people won't need to friend you in order to view the content you want to make public."
This also could be a useful feature for both teachers and students, allowing a degree of visibility and communication without crossing the border to invasion of privacy or surveillance.
