The Texas Board of Education doesn't want to create a panel of academics to fact check textbooks because it would send a message that the current adoption process doesn't work. Not only that, it would create more bureaucracy, apparently. 

From the Texas Tribune:

However, the 15-member elected board on Wednesday narrowly rejected a proposal that would’ve given it the option of creating an expert panel for the sole purpose of identifying errors in textbooks.

The board, which oversees the textbook adoption process, voted 7-8 against an amendment proposed by its vice chairman, Thomas Ratliff, a Republican from Mount Pleasant who often clashes with more conservative Republican members.

Those members, including David Bradley of Beaumont and Geraldine Miller of Dallas, blasted Ratliff’s proposal Wednesday, saying it would send a signal that the current textbook adoption process isn't sound and unnecessarily add an additional layer of bureaucracy to the process.

 
You'd think that after one of those textbooks described slaves as workers (see above) that the Board of Education would put together some kind of system to flag glaring errors that have repeatedly rocketed into mainstream media as national embarrassments. 

However, there is a positive here. Two Republicans voted for the amendment, which was proposed by a Republican.