Eric Rivera, a teacher at KIPP Antioch College Prep Elementary in Tennessee, declined to read a book on same-sex marriage to his first-grade class, instead asking a colleague to do so. According to legal group First Liberty Institute, the school issued a “final warning letter” to Rivera in January for refusing the assignment.

The following day, Rivera was summoned to the principal’s office and reportedly threatened with termination. School officials told him he needed to maintain “fidelity” to the curriculum, and the discipline letter was added to his personnel file. Rivera had no prior warnings or history of discipline.

After facing pressure from school leadership, Rivera requested a religious accommodation. Rather than granting it, the school reassigned him first to a lab and technology position and later to a kindergarten class.

In February, First Liberty sent a letter to the school on Rivera’s behalf. Following that, KIPP Antioch agreed to clear Rivera’s record and announced that “all teachers [would be allowed] to ask another employee to read materials objectionable to their faith,” according to First Liberty.

Cliff Martin, senior counsel at First Liberty, said in a statement, “We are pleased that the school has made the right decision by accommodating Mr. Rivera for his deeply held religious views. Our client is deeply devoted to teaching and is grateful that his record has been cleared and reasonable accommodations will be provided going forward.”

The school did not respond to requests for comment by publication time.