StoryBoard That

Screen Shot 2014-01-13 at 6.24.00 AMStoryBoard That

StoryBoard that allows you to create very simple 3 or 6 panel comics.  The free version lets you create 3 storyboards a week, more than enough for most student applications.  If you like it, there is a paid version for classroom use.  The StoryBoard That homepage has a simple video tutorial, and there lots more available.