FARMINGTON – Sarah Isabelle (Horn) Cassidy, 91, of Farmington passed away August 6, 2025, at Cedarhurst of Farmington. Sarah’s family moved to Willard, Missouri, in 1941 where she graduated from Willard High School in 1951. She married in 1955 and after her divorce moved to Farmington, Missouri, in 1967. Sarah started her teaching career in 1972 at Herculaneum High School and then transferred to Farmington High School in 1975. Sarah lived with her best friend, Jo Ann Owens, whom she went to high school with.