In case you missed it on PBS or won't be at your local viewing, the full documentary "Revisionaries" is now available online at PBS.
If you haven't heard of it, it follows the drama of the Texas textbook controversies when Don McLeroy tried to rewrite both science and history in public schools around the country.
Texas is the second largest single adoption state in the nation, but with California having budget issues they are the single largest buyer of textbooks in the nation. As a result, textbook publishers are unlikely to release books that do not conform to Texas standards. This gives the Texas board of education almost unilateral control of science, health, and history education for the next few decades.