McGhee joined the faculty of Berklee College of Music in 1966. Among McGhee's students are noted saxophonists Bill Pierce, Javon Jackson, Donald Harrison, Antonio Hart, Sam Newsome, Richie Cole, Greg Osby, and Ralph Moore. While devoting his time to teaching, McGhee wrote the instruction books Improvisation for Saxophone and Flute: The Scale/Mode Approach and Modal Strategies for Saxophone.