Attention-deficit/hyperactivity disorder (ADHD) is a common neuro-developmental disorder that causes controversy; this may have a negative effect on the ability of families, teachers and healthcare professionals to achieve shared understanding and goals. This article reviews recent research of the knowledge and attitudes of children, adolescents, parents, teachers, healthcare professionals and the public about ADHD. Findings suggest that misconceptions about ADHD persist, and children with ADHD and their parents report stigmatizing experiences. Educational interventions to improve the knowledge of teachers about ADHD appeared to be effective in the short term. Parents and professionals working together in the diagnosis and treatment of children with ADHD may have different views about their roles in the shared decision-making process. Studies have reported both similarities and differences in parents' and professionals' views about the effectiveness of treatments for ADHD, but all stakeholders supported the principles of information-sharing and working in partnership.