False. In every single case, it was SCHOOL BOARDS and STATE LEGISLATURES who were attempting to FORCE biology teachers to either undermine evolution or talk about intelligent design.
In Dover, PA, where the latest case was fought, the school board instructed the teachers to read a statement before class about intelligent design. The teachers, all of them, REFUSED.
AARON Mason, a teacher in a Washington State school, was suspended for two days without pay for showing a creation video and arranging a creationist guest speaker to present scientific evidence supporting creation and a young earth to his eighth-grade class.
However, the ironically named humanist thought police, the American Civil Liberties Union, wrote to the district superintendent complaining that this was not enough, since Mason had ‘shattered the foundation for the students’ further science education’. The ACLU noted that Mason had ‘crossed the line’ before — while working as a highschool wrestling coach, he had worn a shirt depicting Jesus.
‘Teacher’s creationism lesson causes stir’, Philadelphia Inquirer, USA, August 22, 1996.
Also, here's another article about a teacher being punished for admitting he believes in creationism and discussing some of the possible flaws in the theory of evolution. http://www.aclj.org/News/Read.aspx?ID=348
The fact is that current curriculum standards almost everywhere prohibit discussion of ID or creationism, and in many cases even discussion of the weak points of the evolutionary theory. The media cases you mention are all attempts to allow other theories to also be discussed.