The Freedom From Religion Foundation is threatening to sue a New York school district over songs taught in music class that include the words "God" and "Lord."

In June, the atheist group sent a letter to Shenendehowa Central Schools Superintendent Oliver Robinson voicing a parent's concern over the tunes, including "Thank You for the World So Sweet," "Now I Lay Me Down to Sleep," and "He's Got the Whole World in His Hands."

Two letters followed the first request. The latest, received Aug. 6, was from an FFRF attorney threatening legal action.

The school district has continued to dismiss the group's demands, saying the songs don't violate any laws.

"None of the songs was taught, or used, as prayer. Thus, the case you cite dealing with school prayer is an inapposite," school district attorney Kathryn McCary said in response to the group's demands. "[The songs] were used appropriately to teach musical concepts.

Bill Donohue, president of Catholic League, agreed the lawsuit likely won't stand in court.

"They want to censor the expressions of Christianity -- and they only go after the Christians, not the Jews or the Muslims. Now they're going after little children over an innocent song," he told Fox News.

The FFRF said the religious tones in the songs are not "minor" and it has "made it clear" the parent is willing to take the issue to court.