For example, roughly 10 percent of students moved between small and regular classes, largely because of parental complaints or behavioral problems. (educationnext.org)
The first may have been plausible when administrators could judge a teacher's effectiveness only by observing classes and monitoring parental complaints. (educationnext.org)
In autumn 2011 there were fears from head teachers of a surge of malicious complaints when it was announced inspections could be triggered by parental complaints even if they were anonymous. (bbc.co.uk)