Switching workspaces with dual monitors

Switching workspaces with dual monitors

I'm working on Ubuntu 13.04 and have a second monitor connected with a
VGA. I currently have the second monitor as an extended screen. I was
wondering if there was a way that I could set it up so I could put a
window on my second monitor, switch workspaces on my main display and the
second monitor display wouldn't change?
I think it was a thing in the past, but I haven't found a solution. I just
want my second monitor to be consistent while my main workspace remains
dynamic.