It makes it nearly impossible for the kids to concentrate. You'll get bopping heads and lots of singing and disrupting the others. And then the kids will imitate you and the other teachers :)
So I soon switched to playing lots of classical music with Vivaldi's Four Seasons being my favorite. But then this year, I was introduced to these gems:
Mentioning this to one of the parents, they sent in the Simon & Garfunkel CD above. Again, love it BUT not for brainstorming or drafting stories. It's much more upbeat. It's actually a great motivating CD (first few songs) so I play this one when we are editing our work. I'll challenge them to circle five silly mistakes that they want to change before the song is done. Because of the tone and rhythm of the music, they tend to focus and look more intensely for their mistakes. It's almost Rocky-ish as they race through their writing finding all of their errors. It seriously has upped our game!
This year? My friend, Kelly, swears I'll love her Grateful Dead Baby CD. :)