Bottom line. Are you willing to deprive your children from learning as much as they can because some beareaucrats say so?
If you don't think that this is a nonsensical, pointless, and potentially harmful (to the student's education) law then I don't know what to tell you.
And again, your speeding example is an entirely different animal. You cannot compare a law regulating how fast you can drive two-plus tons of machinery down a road with a law saying that teachers are forbidden from displaying flags in a geography classroom. I would hope that people here on FR would be able to make that distinction.
The answer to your question is of course not.
But this particular law you object to is trivial compared to the REAL problems we have in our public school system from leftwing indoctrination. Students reading Rigoberto Menchu instead of Adam Smith? Students being taught that the founding principles of our country are nothing but constructs used to prop up the power of racist, misogynistic, capitalistic oppressors, etc. etc.
You are elevating this triviality far beyond its real importance. Your arguments are those that should really be addressed in the Colorado legislature, and there are not enough facts in this article to justify your position. Was there a problem with marxist high school teachers permanently displaying certain flags (Vietnam, Nicaragua, Cuba, Venezuela, whatever the regime of the moment for the left is) having nothing to do with their teaching curriculum, but rather part of their leftwing indoctrination? Who knows? I don't, and I suspect that you are taking a strong position without knowing either.