Hamilton County Board of Education members Chip Baker and Linda Mosley sat at their last regular school board meeting Thursday evening.
Both decided not to run for reelection.
Superintendent Rick Smith presented each with a plaque before Thursday's meeting.
Mosley said she had focused her four years on the board on serving teachers and students.
"I want to thank you for allowing me to serve you for four years as your representative, not just in District 7, but all of Hamilton County," she said to the audience.
Baker is finishing up his third four-year term, making him the longest serving member of the current board, Smith said. He served as board chairman from 2003 to 2005.
Baker told his fellow board members to remember "our kids rely on us."
"My admonition to you as a board is stay together. Do the right thing for all our children," Baker said. "Don't be petty. We all have our differences. Respect the fact that we can all agree to disagree."
Signal Mountain dentist Jonathan Welch will fill Baker's District 2 seat and retired teacher Donna Horn will fill Mosley's seat in District 7.
New and reelected board members will be sworn in Sept. 4.