Quick question for publishers re PPV

[Michael Luby <ml1047@columbia.edu>]

Dear liblicense

Question on individual article (or articles) purchase and fair use

If a faculty member/their department purchases one or a small 
number of articles from a journal for which their institution, 
obviously, does not hold a subscription [at around $30 or 
$35/article as is generally the price], can he or she post the 
paper(s) online within a password-protected, class-specific web 
site, such as within a Blackboard class portal, to use the 
material for instruction?

Thanks,

Michael Luby