Transitions using the smart board. There are different songs for each transition. The students help by touching the star to start the music. Also has a tutorial on Cutting Music down to shorter segments with GarageBand. I don't have a smart board... But maybe could use my Wacom slate?
a really fun idea for classroom management/transitions... the "action cup!" write different actions on popsicle sticks, such as "pretend your legs are spaghetti" and have one student pick an action for the class to do each time they transition!