Edwards began her coaching career by returning to her alma mater, Northwestern Community High School in Flint, Michigan, for five seasons (1990–1995). She guided her team to the 1993 state championship with perfect 28-0 record, a 1992 state champion runner-up finish, and compiled a 78-23 overall record (.772). She was named 1993 "High School Coach of the Year" in the state of Michigan.
Edwards was named to the team representing the USA at the 1987 William Jones Cup competition in Taipei, Taiwan. The team won all seven games to win the gold medal for the event. The USA was down at halftime in the opening game against Japan, but came back in the second half to win, helped by 15 points from Campbell. Edwards was the second leading scorer on the team, averaging 12.4 points per game over the seven games. She was one of three players from the USA team to be named to the Jones Cup All-Tournament Team.
In the following year, 1988, Edwards was also named to the Jones Cup team. The USA team was not as successful, with a 3–2 record, but that was enough to secure the silver medal. Edwards was the leading scorer on the team, averaging 15.4 points per game, and tied for the team lead in steals with 15.