Welland (2011 population 50,631) is a city in the Regional Municipality of Niagara in Southern Ontario, Canada. The city is located in the centre of Niagara.
More than 5 million U.S. children, or 9.5 percent, have been diagnosed with ADHD as of 2007, according to the U.S. Centers for Disease Control and Prevention. Kids with the condition may act more impulsively, and have difficulty paying attention and controlling their behavior.
This means that in a class of 30 children there will be one or two children with ADHD. Boys seem more likely to have ADHD than girls. In the UK, between three and nine boys are diagnosed with ADHD for every girl who's diagnosed with it but this may be because boys and girls tend to have different symptoms of ADHD.