I've never done this with a class full of children but I did use a similar method with my three stepchildren (four kids including my own son) when they were very small and just with us on the weekends. It was chaos until I started using the chart, and it did give them an incentive to behave a bit better. One shouldn't have to bribe children to be good, but sometimes we do what we have to, to have some peace!
Especially when they are children that haven't learned respect for authority or for people in general. Today's kids are a handful, many just don't get the early discipline they need. I'd say, give it a try.
Doesn't sound like it would make things any worse, certainly!
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.