The Texas school board will vote today on a resolution aimed at keeping 'pro-Islamic/ anti-Christian' language out of textbooks in the state.
Supporters of the motion say the resolution is needed to prevent a growing trend.
It would not be binding but would have a significant impact in one of America's biggest schoolbook markets.
An example of the complaints is that, untl 2003, schoolchildren were using a book that used pejorative language to describe the crusaders while 'euphemising Muslim conquest of Christian lands as "migrations".'
The panel meeting in Austin will hold the vote to 'ensure there is a balanced treatment of divergent groups', Education Board chairman Gail Lowe said.
'In the past, the textbooks have had some bias against Christianity,' she told the New York Times.
The measure was drafted by Randy Rives, a member of a school board in Odessa, Texas, who has previously pushed through a Bible study curriculum.
He told the BBC: 'It's the pro-Islamic, anti-Christian teachings in these books, that is what we are concerned about.
'We're teaching double the beliefs and specifics about another religion than we are about Christianity, which is the foundation of our country.'
According to supporters of the issue, the vote will warn publishers not to print 'anti-Christian' textbooks if they want to sell them in Texas schools.
Although the vote would be non-binding, if successful it could carry weight in the publishing industry.
The resolution says the book cited as an example approved for use until 2003 featured 159 lines of text about Islam, contrasted with only 82 about Christianity.
It also states the book referred to crusaders' massacres of European Jews but ignored a 15th Century massacre of Baghdad Muslims by a Muslim conqueror.
The resolution claims textbook writers habitually call Christians 'violent attackers' or 'invaders' while playing down Muslim conquests in Europe as 'migrations'.
The Texas Freedom Network has slammed the vote, claiming the board is 'putting politics ahead of expertise and refusing to consider the advice of real scholars before doing something provocative and divisive.'
A statement from the group added: 'Indeed, the board has asked no scholars or other experts for the public advice about resolution.'
It is unclear whether the resolution will have any practical effect as the board has already agreed its standards for world history text books and is not due to revisit the issue for some time.