Alright Google! You did not fail me. I found two great items to assist me in understanding the number line and what makes it so unique. First, I found a packet of activities and notes from one of Kim Sutton's workshops. Then, I found the handy-dandy You Tube video to help me understand it all a little more.
I really think this all goes so well with the Singapore Math (see blog post from August 10) strategies teachers are incorporating at MWE.