I strongly agree, Chris! I use a portable scoreboard(Magic Slate available in most toy aisles) in my 2nd grade classroom to maintain student engagement during small group instruction time. Students outside of the small group know I'm "aware" of their behaviors when I simply say, "Wait for it!" for a smilie on my little board, or "Hug those ears!", when I mark a frownie on the little board. These marks are moved over to the large scoreboard when I am near it later. There is minimal disruption to the small group, and to those working independently. I carry that same small board to functions outside the classroom, such as library, lunch, assemblies, etc. It is very effective!
Nancy Stoltenberg
WBT Intern 2011-2012