I finally joined the National Center for Science Education. I probably should have joined a long time ago. What finally pushed me to join was a couple of recent stories about individuals on the Texas Board of Education talking about how school textbooks should address "weaknesses" in evolutionary theory.
Translation: "We think evolution is wrong, but we can't say that we object on religious grounds in science classes because the courts have repeatedly ruled against teaching religion in public schools in the United States, so we'll just attack it at every opportunity."
And because I live in Texas, but, as a Canadian citizen, can't vote, this seemed one way that I might be able to contribute ensuring that my research discipline isn't weakened in Texas schools.