0 how do you teach with music?

Anyone who knows me, knows that I cannot carry a tune (for the life of me). 

I am not a singer.

However, I sing all the time in my classroom (those poor cuties). 

I can't help it, because singing/music is such a powerful teaching tool.

I am looking to do a future post on music in the classroom

I would love to feature how some of you use music to teach.

So....How do you use music in your classroom?