The first relates to disclosure. The sites must have a privacy policy, easily found and understandable, which discloses precisely what is being collected, and how its being used, which includes the identity of any third-part with whom it is shared. The second deals with information collection by the site. The prior two key aspects deal predominantly with privacy issues, while the third relates primarily to safety. For more details visit the full article at WiredKids.org.
Schools have a responsibility to be aware of and monitor student computer use.
Though curricular visits to web sites is permitted, unsupervised use of computers can pose a significant liability unless the school builds appropriate wording into their Acceptable Use Policies. All teachers and schools are probably aware of the necessity to have student use limited to appropriate sites. AUPs routinely cover inappropriate use, define it and make it clear that that type of activity is a violation of the terms of the policy. Worse yet, what happens when a student pays a visit a web site a to which parent specifically refused to grant premising. It may even be as site that the class visits as a whole.