article_snippet.sent: Online advertisements have promised immediate results, but have not made the potential dangerous side effects clear.
article_snippet.sent: Professor Loo's colleague, Dr Donel Martin is worried by the advertisements claiming to improve attention deficit hyperactivity disorder
article_snippet.sent: There is some evidence to suggest maths ability and learning may be improved, but in order to do this we must stimulate certain parts of the brain in a certain way,' Dr Donel
highlights_snippet.sent: It promises to help children with math homework and claims to help ADHD .
  