Voicethread

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Ed.VoiceThread is a web-based communications network for K-12 students and educators. Simple, powerful and safe, Ed.VoiceThread is a place for creating and collaborating on digital stories and documentaries, practicing and documenting language skills, exploring geography and culture, solving math problems, or simply finding and honing student voices.======

http://voicethread4education.wikispaces.com/ -Voicethread for Education Wiki
http://www.edutopia.org/voicethread-interactive-multimedia-albums - VoiceThreads: Extending the Classroom with Interactive Multimedia Albums