Sorry, but the public schools are a lost cause. That's a whole other battle that has already been lost. I have my three out of that system because it no longer holds any value toward traditional American principles.
While your three are out, many many more are in and they are being indoctrinated. How will your three fare, when you are gone and they are but a tiny minority in a mass of brainwashed citizens? All children deserve to hear the true story of America's founding and why she was so great. Society requires that the children be taught to preserve its core values so that it can persist. By writing off other peoples children, you are consigning your own to a future that is very very grim.
I am convinced that our children, being brought up in righteousness in truth in Christian schools or, like ours, homeschools, are the only hope for this corrupt nation.