Using sign language in the mainstream elementary classroom has many benefits. It can help with management and manners for one. The students learn a new language while improving their own behaviors and self-control. You will have fewer interruptions and calling out!
Check out this excerpt from my longer video Sign Language in the Elementary Classroom-Part 1. You can see the whole thing (and part 2) on youtube http://youtu.be/CS-6hFyXSM4