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Bill O'Reilly used his "Tip of the Day" segment tonight to wish a happy birthday to an amazing woman.

Agnes Zhelesnik, thought to be the oldest employed teacher in America, turns 102 years old on Tuesday, January 12.

Zhelesnik teaches pre-kindergarten through fifth-grade students at The Sundance School in North Plainfield, New Jersey, how to cook and sew.

Zhelesnik, who the children affectionately call "Granny," is still going strong and has no plans of retiring anytime soon.

"Agnes just gave you the tip of the day: Be happy with what you do," O'Reilly said. "Not always easy, but worth striving for. Way to go, Agnes."

Watch more above.

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