What is the Photocritic Photography School?
The short answer? An online course where you can learn about photography.
The longer answer? A year-long course that teaches you about photography using emailed lessons and the submission of assignments to the School's Flickr group page where you can receive feedback on your work.
It's run by Haje Jan Kamps (the Headmaster) and Daniela Bowker (the Senior Mistress). Between them, they've written tens of books on photography, delivered hundreds of workshops, and published thousands of articles about taking photos. Once upon a time, Daniela was an honest-to-goodness secondary school teacher, too. So you're in very safe hands.