I quote from "Mother Jones":
The Texas Board of Education has long been a hotbed for science denial, as conservative activists and a handful of textbook reviewers have sought to influence textbook-writing standards in an effort to muddle the basic science around issues such as evolution and climate change. What happens within the pages of Texas textbooks matters because the publishing market there is among the nation's largest; what gets printed in Texas is likely to wind up in classrooms nationwide. Early this year advocates for better textbook oversight won a victory when the board announced it would give teachers' input priority in determining curricula. But by September, the battle was back on, with a raft of revisions that contained obvious biases against mainstream climate science—one McGraw-Hill textbook inaccurately claimed that scientists "do not agree on what is causing the change," and a Pearson text similarly alluded to scientific disagreement. Bowing to public pressure, in November Pearson altered its text to more accurately reflect the scientific consensus on climate change, but the McGraw-Hill text still portrays climate science as an open debate. Meanwhile, a parallel battle played out in Oklahoma over new standards to improve climate science education.