Gray's resignation letter says a new job prevents her from fulfilling her board responsibilities.
The Omaha school board has accepted the resignation of its president and elevated its vice president.
At Wednesday night's meeting, some board members praised Freddie Gray's work for her district and the city.
Board vice president Marian Fey has taken over as president.
Gray didn't attend the meeting. Her resignation letter says a new job prevents her from fulfilling her board responsibilities.
She came under fire several times in her year as board president, especially for her handling of the Nancy Sebring case.
The board hired Sebring, the superintendent of the Des Moines, Iowa, district, in April to replace Superintendent John Mackiel.
Sebring abruptly left her Iowa job in May. She resigned her brand-new Omaha job after emails to a lover on her Des Moines district computer became public.