There's no real quality control. Everyone right and left sees that, said Patterson
• Miseducation
Texas Freedom Network, a group that monitors the religious right, said publishers have deleted passages that describe Islam positively and made changes to promote Christianity.
For example, a reference in a sixth-grade social studies book to glaciers forming the Great Lakes "millions of years ago" was changed to "in the distant past."
Robert Raborn, a member of the conservative Citizens for a Sound Economy, had complained that "millions of years ago" supported the theory of evolution and excluded theories such as intelligent design.
That same publisher, Glencoe/McGraw-Hill, addressed another of Raborn's criticisms by deleting a sentence that stated that acid rain produced in the United States is a major environmental problem for Canada.
http://www.chron.com/cs/CDA/story.hts/front/1639261