According to the DSM-5 criteria for Attention Deficit/Hyperactivity Disorder (ADHD):
“People with ADHD show a persistent pattern of inattention and/or hyperactivity-impulsivity that interferes with functioning or development.”
American Academy of Family Physicians: DSM-5 criteria
PDF chart of symptoms and requirements for diagnosis of ADHD
National Institute of Mental Health: Attention Deficit/ Hyperactivity Disorder
Site contains brief definitions, signs/symptoms, risk factors, treatment approaches, tips and further resources. PDF contains similar information in pamphlet form.
Comprehensive resource for teachers, parents and professionals; includes basic information, relevant articles and research, webinars, newsletters, discussion forum, magazine and podcast
Children and Adults with ADHD (CHADD)
Organization committed to serve as a clearinghouse for evidence-based information on ADHD, provide support, and advocate for policies. Site includes extensive downloadable fact sheets; well-organized topic pages; podcasts; online communities; parent training courses; searchable library catalog for books, articles and other resources
Attention Coach Jeff Copper offers extensive articles, blog posts, links to resources, podcast and video channel, newsletter and coaching services
PDF pamphlet with basic information
Attention Deficit Disorder Association (ADDA): ADHD: The facts
Links to page covering definition, types, causes, diagnosis, treatment and accommodations with references to research included; ADDA also offers virtual support groups, professional directory, calendar of events, blog, articles and courses.
ADDitude Magazine: What’s the difference between ADD and ADHD?
PDF includes explanation of the three primary types of ADHD with lists of symptoms common in each type and examples of behavior in daily life.
Video from Understood.org: What is ADD/ADHD?
“Here’s everything you need to know about Attention Deficit Hyperactivity Disorder (ADHD) in children. Thomas E. Brown, PhD, discusses ADHD diagnosis, ADHD symptoms, available ADHD treatment options, and ADHD medication.”