One of the major problems I see whenever someone is trying to change the curriculum at their local school is that only a tiny percentage of parents really knows how bizarre the curriculum is, how far off the standard map it is from their own upbringing. And if, for example, I try to tell other parents, they simply do not believe it, and I lose all credibility.
Even my own husband doesn't believe it-- "They don't teach stacking??? Come on! That's hogwash." The list of topics I claim not covered is so deep and so wide, I must be exaggerating.
Even when you're talking to parents whose kids are in the same classroom, they seldom believe it. Even when these parents are college educated in the sciences or engineering themselves, they don't seem to coherently examine the whole arc of a school year (or years) to notice what's missing. They seem to assume that things are fine--until middle school is reached, at the earliest.
So, how is this best combatted? Handing someone a textbook and saying "go ahead, try to find stacking" doesn't work, as most won't see that as proof of anything. There's no way to show the overall year in, year out deficiencies by looking at one text, either. So what can work? What can help other parents to see how far from their common expectation the current curriculum is, while still saving one's credibility?