A New York City first grade teacher stockpiled a “sickening” trove of child pornography — and was busted after his own family taped him fessing up to the disgusting conduct, federal prosecutors alleged.

Christopher Ward, 37, allegedly used a messaging app to share the hundreds of repulsive photos and videos for at least a year, while teaching some of the Big Apple’s youngest pupils at a Queens public elementary school, the feds said.

“Every day, Christopher Ward stood at the front of a classroom of first graders while allegedly storing hundreds of images exploiting children just like them,” Manhattan US Attorney Jay Clayton said in a statement.

Christopher Ward allegedly possessed and shared the images while he taught first graders. Bloomberg via Getty Images

Ward was already being pr

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