This presentation is a great overall view of ADD. Each point Dr. Steven Hinshaw makesis backed by research. One piece that was extremely significant was that if the parent of a child with ADHD has even mild depression, outcomes for the child are significantly less positive. We need to help our parents where by indeed we help our children. Watch the presentation here - Jan 12th 2011 presentation by Dr. Hinshaw. He advocates a very structured but warm school environment with some adjustments in homework requirements to meet the students needs. Children with ADHD need rewards as well. Teachers and teaching environments make a difference.
Along these lines - I believe the book The Kazdin Method for Parenting the Defiant Child is a great resource for parents of all children, especially any child that is struggling. It teaches specific steps in positive reinforcement of good behavior and very researched techniques to help the child succeed.