The University of the Arts in Philadelphia runs a program for high school students on Saturday. There is both a Fall and Spring semester. Students can take classes like Portfolio Preparation, Animation, or Experimental Photo. It is a great opportunity to take a class at this outstanding art school. For more information take a look at their website.
http://www.uarts.edu/academics/pre-college-programs/saturday-school-9-12
http://www.uarts.edu/academics/pre-college-programs/saturday-school-9-12