"I'm surprised you didn't know."
What is that supposed to mean?
So, is it your contention that we should accept the fact that teachers are free to indoctrinate?
Remember this?
Video: Parents angry over Obama song at NJ elementary school
Once you make excuses for teachers that are dishing out political propaganda you agree with, you are also making excuses for teachers that are dishing out political propaganda you do not agree with.
Elementary and high school education and partisan political advocacy do not mix. Period. No matter which flavor of partisan politics they are dishing out.