Fairfax County Supervisor Thomas M. Davis III said yesterday he will ask his fellow supervisors today to appoint Carla M. Yock, a Glasgow Intermediate School teacher, to replace James W. Kitchin on the county School Board.

Kitchin, 57, a School Board member from Davis' Mason district since 1981, has done a fine job, but because of his job commitments does not have the time to meet with parents or visit schools during the day, Davis said.

Kitchin's term expires July 1, and Davis said "we mutually agreed" that he would not seek reappointment to a third two-year term on the 10-member board.

Yock said she will resign her job teaching history and civics to avoid conflict-of-interest problems. Yock had been a candidate for the School Board post that ultimately went to Kitchin four years ago, but a selection committee questioned her lack of experience at the time.

Davis said he asked around his Mason district and found Yock is now "acceptable to a wide variety of folks." He described her as an outstanding teacher and said, "She's got my confidence."

The Board of Supervisors is expected to honor Davis' request for the Yock appointment to represent his district on the county's second most powerful board.

Yock would be the third new member of the board to take office July 1. Frank Francois was named to succeed Robert E. Frye as the board's minority representative, and Kohann H. Whitney will succeed Carmin C. (Chuck) Caputo as the Centreville member. The board also will have a new nonvoting student representative. The school system, the nation's 10th largest, also is acquiring a new superintendent, Robert R. Spillane, and several other new top officials.

Yock, 46, has two daughters in the county schools. One will be a freshman at the new Jefferson High School for Science and Technology and the other a senior continuing at Thomas Jefferson High School as the school is being converted to the science and technology center. The school is at 6560 Braddock Rd. Yock has worked on school bond committees in the Mason district and in Davis' campaigns.

Yock has lived in Fairfax County for 16 years and taught in the county for seven years, all of them at Glasgow, located at 4101 Fairfax Pkwy.

She said yesterday she wants to be on the School Board because "education has been my all-consuming interest since I was 5" -- as a student, parent, taxpayer and teacher. She said school board experience also runs in her family -- her father was president of the board in Houston, Minn., a small farming community, for 16 years.

Yock said if selected she will pay special attention to three Mason district issues: the merger of Thomas Jefferson and Annandale high schools at Annandale High, the evolution of a new Thomas Jefferson High School for Science and Technology, and the special needs of Falls Church and Stuart high schools, where some English-speaking parents are complaining that their children are being neglected because of heavy demands on school resources by immigrant children.

Kitchin, program manager for a high-technology company, Hadron Inc., said he had told Davis he would be happy to continue on the school board, but could not do school business during the day because of his job. Kitchin said he missed only one of the school board's regular twice-monthly meetings and a few committee meetings during his four years as a member