The BBC Radio World Music Archive is comprised of music recordings gathered over the course of ten years from countries all over the globe. The collection includes recordings from some dangerous and hard to reach places like North Korea and Iraq. In fact, the BBC reports that the recording from North Korea is the first radio recording done by anyone outside of the North Korean government.

Applications for Education
The BBC World Music Archive could be a good resource for teaching lessons on world culture through music.

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Arts Edge – Podcasts and Lesson Plans
Classics for Kids – Classical Music Lesson Plans
Music Theory Lessons and Tutorials