Characteristics and Behaviors of the Gifted

Focus on the person's strengths and be well aware of his or her uniqueness, preferences, and challenge areas.

Understanding, Diagnosing, and Coping with Slow Processing Speed

Especially helpful information for the Twice Exceptional mind - gifted + learning difference, including ADHD

ADHD Child and Gifted at School: Twice-Exceptional (2e) Students | Information on Attention Deficit Symptoms, Treatment, Diagnosis, Parenting, Teaching, and More - ADDitude

Gifted Students and Underachieving - FamilyEducation.com

Good article. Also, take a look at Dr. Ned Hallowell's recommendations in Delivered from Distraction.