My experience with scoreboard is that my younger students (K-1) find just winning it a reward. I teach music and only have them 35 minutes at a time, so maybe that keeps it fresh, since their teachers generally don't use it. I did hear one Kinder teacher talking about points in reference to her own class.
One thing Coach B changed is that we should teach the children to make responses short. Children, especially the little boys, like the idea of "power". So I tell them that a short "woo" gives the child more power. Of course, I don't mean power in the cartoon sense the way they think of it, LOL! They give it because they want some of their own.
I've found that it doesn't do any good (even counterproductive) to advocate for WBT (isn't that sad?), but if you just do it and let them see, they start adopting at least parts of it. I started, "Put a bubble in your mouth" at my school and now all the teachers are saying it. Even the older students will pop a bubble in their mouths. It so much more effective than nagging them to be quiet in the line. When they see me in the hall or wherever, they put a bubble in and frame their faces at me (Keeping their dear teacher happy.) I occasionally snap a pic with my iPhone of an especially good bubble...very reinforcing. I use descriptive praise. They will poke me just to get me to look at their bubbles. I read a book many years ago..."Don't Shoot the Dog" by Karen Pryor...that taught me so much more about behavior modification than all my college courses. There is so much more to it than just reward and punishment.
I have found the ten-fingered woo much more reinforcing than tangibles, which I use very sparingly, usually for answering a particularly difficult question rather than for following the rules. The fact that they never know when it might be a "candy question" keeps them engaged and clamoring to answer. Our PBIS (school-wide behavior program) is totally oriented to tangibles, so I have to use them some. I will "pay" a gator buck to a child for leading the rules, showing a kindness (such as handing someone a tissue or picking up something someone drops), etc.
One thing I do a bit differently with Scoreboard (Coach B okayed it) is that I require my students to be three points ahead of me in order to "win". I use it to throw a little math in my music classes. They have to figure out how many more points they need to win. For instance, say the score is "Oh, Yeah" 4 and "Mighty Groan" 3. I might ask, "Who is winning?" They answer, "You are." "How many more points do you need to win?" I keep it competitive and with the younger ones, I usually manipulate it so that if they are winning it is ONLY by 3. Then I can say, "Who is winning?" We are! But if you don't leave my room quietly and I get another point, who will win? If they only lack one point, I can say, "How many points do you need to win?" (one) "If Mrs. So & So tells me that you made it all the way back to your room in a quiet line, I will give you a point." (This makes points with the classroom teachers.)