Curtis Marks, 60, a physical education teacher at Garnet-Patterson Junior High School in Washington, died Wednesday at Howard University Hospital after he suffered a heart attack at school.

Mr. Marks had been a teacher in the D.C. public school system since 1969, when he moved here from Tyler, Tex. He also had been a physical education teacher in the Tyler school system and a coach of basketball, football, track and baseball teams. He taught at Cardozo High School here from 1969 until last year, when he transferred to Garnet-Patterson.

Mr. Marks's wife, Cilla, a home economics teacher at H. D. Woodson High in Washington, said her husband had no history of heart trouble.

"He thought physical activity had a tendency to strengthen him," she said. "He knew the importance of keeping active."

Mr. Marks was born in Paris, Tex. He earned bachelor's and master's degrees in physical education at Prairie View A&M College in Texas, where he was a member of the football, track and basketball teams.

In addition to his wife, of the home in Washington, survivors include two daughters, Nina Wilkins, of Corpus Christi, Tex., and Dr. Shirley Brown, of Houston, and four grandchildren.