Is Attention Deficit Hyperactivity Disorder a ‘made-up’ term?

Is it simply an excuse for bad behaviour?

How do children with ADHD really experience school?　
This practical teacher’s guide dispels all the myths and gets down to the facts about ADHD. It explores the nitty-gritty of what you need to know in order to help the children in your class to cope with this complex condition.
This fully revised second edition gives an overview of the disorder based on the broad internationally recognised approach to ADHD, which takes account of its biological as well as environmental elements....