This article briefly outlines the things parents should look for if they feel their child might have ADHD.
The list of ADHD symptoms are broken down into three main categories:
The author elaborates on each category and lists the types of behaviors parents can expect to see n each category.
The author also echoes the main stream opinion that food additives, sugar in the diet and nutritional deficiencies play little role in ADHD. I have written extensively in other places why I feel strongly that is this wrong.
For an excellent list of behavior symptoms of ADHD go to:
Symptoms of ADHD in Children