A New Jersey school district has removed a substitute teacher who told a class of first-graders that Santa Claus is not real.

Montville Schools Superintendent Rene Rovtar said in a statement that the teacher is no longer working for the district, USA Today reported Wednesday.

The unnamed substitute teacher “announced to the class” last week that Santa is not real, according to a letter to parents from Cedar Hill School Principal Michael Raj obtained by NJ.com

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Raj told parents in the letter that he spoke with the teacher "regarding her poor judgement in making this proclamation."

"As a father of four myself, I am truly aware of the sensitive nature of this announcement,” Raj wrote, telling parents to “take appropriate steps to maintain the childhood innocence of the holiday season” if their children raise the issue at home.

Rovtar said in an earlier statement that she was "troubled and disheartened by this incident."

“The childhood wonder associated with all holidays and traditions is something I personally hold near and dear in my own heart," she said.