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Kathy Lennon will join the Hamilton County school board, replacing Jonathan Welch as the representative of District 2.
Lennon received 51.4 percent of the vote in the District 2 race, which encompasses Signal Mountain, Red Bank and much of the Stuart Heights area.
She ran on a campaign of change, saying it's time for a shake up in the school system's leadership.
Welch was elected to the board in 2012, and served as chairman this past year, leading the board through the tumultuous months following the rape of an Ooltewah High School freshman.
He received 48.6 percent of the vote.