We have had some success with Transforming the Difficult Child - it requires commitment and is not easy but when I am successful with it, I noticed that my DS is too. The Yale Mag article and related research seems to really supports the NHA. Also, I would suggest making some sort of chart with input from your DD about going about homework or have an after school routine. We have one with a magnetic list of all that has to be done after school and we break homework up work 15, break 5, work 15, break 5 - it's still a struggle to get HM done before dinner as my DS is not home from school until 4:15 or so.
