MIT Open Courseware offers an introduction to fiction course that uses examples from classic works such as Oscar Wilde's The Picture of Dorian Gray and Mary Shelley's Frankenstein to teach the characteristics of good fiction writing.
You can also check out Online Degree World's list of 100 Free Open Courseware Classes on Journalism, Blogging, and New Media for more suggestions on online educational opportunities for freelance writers.
Reading and Writing Short Stories: This class from MIT Open Courseware focuses on developing a better understanding of the craft of the short story.
From MIT's Open Courseware Project to language courses online, you can find almost anything you want to learn on the Internet today.
MIT Open CourseWare: One of the best online learning resources for older children in art and nearly any other subject you can name.