
Apple announced this morning that the iTunes U service has topped 300 million downloads in the three years of its existence.
"iTunes U makes it easy for people to discover and learn with content from many of the world's top institutions," said Eddy Cue, Apple's vice president of Internet Services. "With such a wide selection of educational material, were providing iTunes users with an incredible way to learn on their computer, iPhone, iPod or iPad."
iTunes U allows over 800 universities to distribute educational content privately or publicly. Over half of the participating universities are said to distribute their content publicly.
Participating universities include MIT, Harvard, Columbia, and many more (iTunes links). All iTunes U content is free to download and now hosts over 350,000 audio and video files.