Shirley Syrett Morris, 53, former kindergarten teacher in Fairfax County, died Thursday at her home in Annandale of amyotrophic lateral sclerosis, also known as Lou Gehrig's disease.

A resident of the Washington area since 1954, she had taught at the Friendship Day School in Falls Church for about 10 years before joining the Fairfax County public school system.

Mrs. Morris was teaching kindergarten at Franconia Elementary School when she left in March 1976 because of illness.

She was born in Bridgeport, Conn., and grew up in Milford, Conn. A graduate of Middlebury College in Vermont, where she was elected to Phi Beta Kappa, she took graduate work at the University of Virginia.

Mrs. Morris taught in Milford schools before coming to this area.

She was a member of Annandale United Methodist Church.

She is survived by her husband, Earle Jackson Morris of Annandale; a daughter, Michele Fay, of Gainsville, Fla.; two sons, William David, of Alexandria, and Robert Jackson, of Annandale; her mother, Mrs. R.H. Syrett of Milford; a sister, Fay Kester of Lighthouse Point, Fla. and a brother, Robert O. Syrett, of Milford.

The family suggests that expressions of sympathy be in the form of contributions to the ALS Society of America in Sherman Oaks, Calif.