I have embedded an MP3 song on my gallery page but when I switch to another page the song keeps playing and I don't want it to.

Just close the window in which the music player is displayed, and the music will stop.

I have music on my home page and when I go to another page it quits playing. But that doesn't happen with the music on the Gallery Page. If I go from the Gallery Page to my home page then I have two music pieces playing. I understand closing the window on the music player will stop it but I don't think most of my classmates are going to get that.

There are a couple of things you can do:

1. Choose not to have music associated with your galleries.

2. Put up a notice on the gallery page instructing classmates to close the music player window in order to make the music stop. This will be simple to do, and can be as brief or as detailed as you think it needs to be in order to fully inform and instruct your classmates.