Not sure who needs to hear this but as parents, you do NOT have the right to control what your children are taught in public school. Read that again.
As parents, you DO have the option to choose to send your kids to any number of hand-selected schools at your own expense if that is what you so desire. The purpose of public school is not to teach your child what YOU want them to know. The purpose of public school is to teach them what SOCIETY needs them to know. The client of the public school is not the parent. It's the community.