Soundtrap is a wonderful collaborative learning tool for making podcasts and music that I just found out about from Richard Byrne's excellent blog. Soundtrap is an easy to use site that works on any mobile device to record instruments to create music. However, a student can also use one of Soundtrap's instruments and begin to record sound. Through their educational portal everything is "housed" in a safe environment and teachers can communicate via video for feedback or assign assignments.
I highly recommend checking out Soundtrap by clicking here!!!