HOUSTON — Some conservative members of the Texas Board of Education assert that the history books used in this state have a pro-Islamic bias, and they are upset about it.

Never shy about wading into the culture wars, they are planning to vote Friday for a resolution that would send a blunt message to textbook publishers: Do not present a pro-Islamic, anti-Christian version of history if you want to sell books in one of the nation’s largest markets.

“The purpose of this resolution is to ensure there is balanced treatment of divergent groups,” Gail Lowe, the chairwoman of the board, said. “In the past, the textbooks have had some bias against Christianity.”

The resolution was written and submitted to the board this summer by, Randy Rives, who as a member of the school board in Odessa, Tex., pushed through a Bible study curriculum.