Should parents and other interested citizens censor textbooks and other literature for children in schools?

I think that books can be censored up to elementary school really. Once they start middle school those books can be uncensored just because I feel that it is important information that is necessary to know. Instead of waiting till their in college to learn more in depth stuff about history or whatever subjects years later. And I believe that it would be easier to learn about in depth things early making things easier for them to remember since it might be slightly traumatizing so it can’t be forgotten. Then to wait year later and just learn about it and then forget it once the course over.