Thomas K. Minter, who was passed over in the New York City Board of Education's controversial search for a new chancellor, last week resigned as deputy chancellor for instruction.
Mr. Minter did not indicate what he would do next.
The board voted last month to appoint District 4 Superintendent Anthony J. Alvarado as chancellor. The board's initial choice of Deputy Mayor Robert F. Wagner Jr. was rejected by Gordon M. Ambach, the state education commissioner, who refused to grant a waiver of academic requirements for Mr. Wagner.
Richard F. Halverson, the former deputy chancellor under Frank J. Macchiarola and the acting chancellor since March 1, also told Mr. Alverado last week that he would leave his post this month.