The new law "is so vague and overbroad that the plaintiffs cannot know with confidence what conduct is permitted and what is prohibited," the lawsuit states.

A Missouri teachers’ union said Aug. 19 that it is challenging a controversial new state measure that restricts teachers’ use of social networking sites and their contact with students, saying it violates their constitutional rights.

The Missouri State Teachers Association said it is seeking an injunction to block enforcement of part of a law that takes effect Aug. 28. The union and several public school teachers assert the law violates educators’ constitutional rights to free speech, association, and religion.

The social networking restrictions are part of a broader law that was proposed after an Associated Press (AP) investigation found 87 Missouri teachers had lost their licenses between 2001 and 2005 because of sexual misconduct, some of which involved exchanging explicit online messages with students.

Many teachers have complained the law will hurt their ability to keep in touch with students for classroom purposes, personal problems, or even emergencies.

Under the law, school districts must establish policies by January that outline “appropriate use of electronic media such as text messaging and internet sites for both instructional and personal purposes.” Teachers are barred from having “exclusive access” online with current students or former students who are minors. That means communication through Facebook or other sites must be done in public, not private, forums.

The law restricts non-work-related websites that allow communication between a teacher and a student that cannot be viewed by others, though the measure states it is not attempting to prohibit teachers from setting up non-work websites that comply with the restrictions.

Spokesman Todd Fuller said the Missouri State Teachers Association has heard from an increasing number of teachers that school districts have interpreted the law in different ways, including some who say that they have been told they cannot have a Facebook page. That was a fear some educators expressed in comments they made to eSchool News in response to the legislation.

The group’s lawsuit—a copy of which was provided to AP—asserts that the restrictions for non-work-related sites amounts to prior restraint and violate educators’ free speech rights. It also says they could impede religious freedom and association rights by barring teachers from using non-work related websites and social networking sites that allow exclusive access with students.