I am not an educator but have worked with several physicists who bemoan the poor state of physics curriculums in American secondary schools. E.g, there are recent papers by professional educators which essentially argue *against* teaching a modern atomic model in high school. See "Why we should teach the Bohr model and how to teach it effectively" (McKagan, 2007): http://arxiv.org/abs/0707.1541
I have likewise seen many secondary school science educators espouse various objections to teaching modern physics, including it's too hard, students will get confused, not enough time, student math isn't at sufficient level, etc.
This creates a problem in everyday life when the news is full of things like Higgs boson, dark matter, gravitational waves, etc. Popular level magazines and TV shows frequently mention "The Standard Model", when many high school students have never even heard the term. People see those accounts and when I try to explain the atom is not like a little solar system they are bewildered.
However I happened across this video by Dan Fullerton, which effectively summarizes the standard model in a few minutes: High School Physics - The Standard Model
It doesn't seem that hard and I am not convinced all the objections about teaching modern physics in high school are valid. I see some movements to address this, although they are fighting an uphill battle against institutional inertia and voices like the above McKagen paper: http://www.news.cornell.edu/stories/2002/08/new-york-science-teachers-prepare-bring-modern-particle-physics-high-school
I found this video which well summarizes the situation. It is respectfully and tastefully done: http://blog.physicsworld.com/2012/11/12/the-awesome-lack-of-modern-phy/
(Adding link to original source video in case it scrolls off the above-referenced blog): https://www.youtube.com/watch?v=BGL22PTIOAM
I was curious about the opinions of secondary school educators on this topic.