As I keep reading your posts, I find that your points make less sense. Are you aware of what takes place in curriculum development? I've been a teacher for 10 years and have worked with many publishing, tenuring, and other pertinent parts. I can question you with some certainty about your knowledge of how academic perspectives are developed. When a curriculum is approved, it's analyzed through many paradigms before its approved. Since public schools are largely liberal, most conservative or religious perspectives are deleted outright. Those that make it in are often retooled to appear as if they are formed or confirmed in modern day research and lose their original origins. Most curriculum come from an atheistic perspective. This is why private schools and special schooling options are created because the public forums condition them out and don't allow a diversity. In addition to this, PreK-12 public school students are not tasked to come to the classroom to share their perspectives. Their come to learn the perspectives of the curriculum. So, when you say, "perspective diversity," I'm pretty certain you're unaware of what happens.