Last week the American Academy of Child and Adolescent Psychiatry (AACAP) released guidebooks and pocket cards for the assessment (their definition of assessment) and treatment (medical) of ADHD. The etiology, assessment, and non-medical treatment side of things on their data sheets are pretty limited but the medical treatment side of things (surprise!) is very thorough.
As a result it is a great resource for psychoed professionals actually as our medical knowledge is where our weakness usually is on this disorder.
You can download their full document by CLICKING HERE (recommended) or their summary pocket card by CLICKING HERE.