ADHD (Attention-Deficit/Hyperactivity Disorder) is a neurodevelopmental condition affecting a person's ability to focus, control impulses, and regulate activity levels. (ADD is an older term now included under ADHD.) Schools and governments have responsibilities regarding ADHD: provincial education ministries require schools to provide accommodations for students with ADHD, such as extra time on tests, preferential seating, or modified assignments. Healthcare coverage for ADHD assessments and medications varies by province—some provincial health plans cover certain ADHD medications while others don't, creating financial barriers for some families. Understanding ADHD helps explain why education and health budgets include funding for special education supports and mental health services.