Hartenstine died after suffering complications from the flu.
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Hartenstine joined the board in January 2017, filling the vacancy left by the death of Zora Felton.
According to a statement from her family, Hartenstine was a lifelong educator, having spent more than 35 years as a teacher and principal and most recently as a school board member.
"Her love for students and for public schools was apparent to everyone who met her," the family statement said. "We are comforted knowing the tremendous impact we know she had on the lives of young people for nearly two generations."
So sad to hear of the passing of @WCPSS Board Member Kathy Hartenstine ... a true advocate for teachers and schools. A loss for the Wake County Public School System.— Brian Pittman (@HSHSPittman) September 24, 2018
I will miss my friend ...
This is very, very sad. Kathy was a dedicated public servant and a wonderful human being. https://t.co/Ea1v1mRQO9— John D. Burns (@johnburnsnc) September 24, 2018