School system officials said the posters, which they deemed to be anti-President Donald Trump, violated policies that say educators can't take a political stance in the classroom.
The Carroll County Board of Education stood by the school system's decision to remove posters from a few Westminster High School classrooms, and gave direction to Superintendent Stephen Guthrie to create clearer policy and regulation for future incidents.
Guthrie acknowledged at Wednesday's work session there are "varying opinions on the message conveyed in these posters." But, he said, the posters were not removed because they dealt with diversity, but rather because they carry a political message.
Both Guthrie and Rothschild reiterated the board and school system's support of a diverse environment through statements they read Wednesday.
The Council on American-Islamic Relations, the nation's largest Muslim civil rights and advocacy organization, also spoke out against the removal of the posters in a news release sent out Wednesday, Feb. 22.
"Educators have an important responsibility to foster a learning environment that is inclusive and welcoming for students of different backgrounds," Zainab Chaudry, CAIR Maryland outreach manager, said in the release.
"Particularly in this tumultuous political climate, forcing teachers to remove pro-diversity posters not only chills free speech in public schools, it also sends a hostile message to the student body that their differences are not valued, appreciated or celebrated."
Other political items in classrooms have come to light since the posters were removed at Westminster High School.
A figurine depicting Hillary Clinton as a nutcracker was found in a Manchester Valley High School classroom. Carroll County Public Schools spokeswoman Carey Gaddis confirmed the item was found in a classroom and has since been removed.
The Board of Education talked about other ways to promote diversity through poster contests where students could create images to represent inclusivity.
"While staff and students have First Amendment rights subject to reasonable time, place, manner and restrictions within the school setting, classrooms are designed and should be promoted to convey and promote the approved curriculum," Guthrie said.