Half of abuse charges in Wales considered unfounded

Over half of accusations made against teachers and teaching assistants by pupils in Wales turned out to be false, malicious or unfounded.

http://www.bbc.co.uk/news/uk-wales-16927479

The UK and Australia have many of the same issues as the US when it comes to this.

And also a report from October, 2011

http://www.bbc.co.uk/news/education-15319933