I'm going to tell you how Texas official textbooks are chosen as these are the textbooks sold to every state. If Texas doesn't approve a textbook, it doesn't get published. It works like this:
The reason Texas official textbooks are important to this nation, is this: Texas buys more textbooks than any other state. The publishers of textbooks bring their textbooks to Texas to be officially adopted by our Texas Board of Education. Only when this Texas Board approves a textbook, does it get printed and sold to other states.
If this board rejects a textbook, and it can't be fixed by the publishers to be accepted by this board, this book does not get sold.
So, who is on this Texas Board of Education who decide which textbooks are going to be sold to schools nationwide? These members are elected by the voters in Texas. Most of those chosen are of the religious right - right to life, liberty, and independence - conservatives.
There are a few liberals on the board who yell and scream because their liberal crap is not allowed in those textbooks.
If our board members find mistakes or intentional rewriting of, say, a history book, they make sure that book gets changed to reflect the true facts of history. It is the same with each textbook. So, in official textbooks across the nation, they have been approved by Texas conservatives.
There are some posts on this thread that are not accurate about "Texas textbooks". This is likely because the poster was mistaking these books talked about for approved state textbooks. If you live in Texas (or not), the meeting sessions of the Texas Board of Education may be seen on the Texas Legislature website when they are in session.
What this board cannot do, is, kick out liberal teachers who espouse whatever they want in a classroom and can bring whatever material they want into the classroom with them. The best answer to ensure good teachers is to elect conservative school board members and have input when a school superintendent is hired so there is a better chance of a conservative superintendent being hired.
I have seen some of those meetings on TV, and the libs sure do get totally insanely mad. In one of the meetings they wanted to totally ignore the nation’s beginning and founding era and focus on more modern day “history” in order that it be more relevant.
These people are truly living in their own universe.