(Portland, OR)  --  Students at Concordia University of Portland are protesting the school's unexpected closure.  KATU reports more than two-dozen students walked out of class yesterday morning to hold a demonstration before marching to the home of University President Dr. Thomas Ries.  The students say they feel like they're being taken advantage of.  Concordia University announced on Monday that its board of regents has voted to cease operations at the school by the end of this spring's semester.  The school says it's facing mounting financial challenges as well as a changing educational landscape.  A student filed a class action lawsuit against the school shortly after Monday's announcement.