Have you seen this video? You know, the one of the kids singing a praise song to President Obama?
To me, schools and their teachers should stick with the who, what, where, when, why, and how and leave the propaganda and influence to the parents' and guardians' discretion. They do not allow public school teachers to influence religious beliefs, and that's how I think it should be across the board with science, politics, and even history, too.
If you want to glorify the country and promote patriotism, that's fine, but if kids aren't allowed to worship Jesus, they shouldn't be allowed to worship any other person, either.