The cumulative effect is clear: schools can rely more heavily on fair dealing for the copying that takes place on campus and in the classroom. This includes copies made by teachers for students for instructional purposes, copies that previously formed a core part of Access Copyright's claim of the necessity of a license. Indeed, it will be very difficult for educational institutions to justify the Access Copyright license in light of this decision.
via Michael Geist - Why the Supreme Court's Copyright Decisions Eviscerate Access Copyright's Business Model. (emphasis mine)
I wonder how this will impact online use of copyrighted content. Fair dealing lets us use all kinds of content within the classroom, but gets messy when posting content online. Is the LMS just an extension of the physical classroom? How about a publicly visible site, such as a blog or wiki site used for a course?