A female Clifton High School history teacher has denied allegations she had sex with a 16-year-old male student on two occasions.

Twenty-six-year-old Kristin Leone pleaded not guilty to numerous charges -- including sexual assault, child endangerment and two counts of official misconduct -- during a state Superior Court appearance Tuesday in Paterson.

She remains free on $100,000 bail.

Passaic County prosecutors say the first alleged incident occurred on school property, the second in the teacher's Clifton home. There's no evidence to show the boy was coerced, but authorities say the relationship was not legal.

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