This model is being used under the guise of parental rights. However, it is not about parental rights, but about transphobia and misinformation. If you are being an active parent, then your children will come to you. If you aren't, why are you only now taking a weird stance on being involved? Transphobia. There is not a single peer-reviewed study that suggests lack of support discourages a person from being trans. None. There are several that say a supportive environment curbs suicidal thoughts and lessen depression and anxiety. If you truly want schools to focus on reading, writing, math, and science, and only those things, then schools need to stop providing food, clothing, transportation, extra curricular activities that are not solely academic. None of those things fall under reading, writing, and arithmetic. Compassion is the bedrock for all religions (who seem to be the ones in support of this bigotry) and yet instead of trying to alleviate the pain in our neighbor's lives, we instead want to deny their existence and their right to exist. Your children are watching the way you are behaving and they see what you are saying about them, their friends, their cousins. You are doing way more damage to your parent-child relationship than this policy ever could.
I strongly oppose this policy and any similar policies that do not allow common courtesy and basic human respect for someone we may not understand.