Susan Szachowicz was 16 years old in 1970, when she walked through the doors of the new Brockton High School for the first time, wearing a state championship track jacket and red Adidas Gazelles.  

In December, following a four-decade run at the Forest Avenue school as a student, history teacher, and most recently as principal, Dr. Szach, as she is known, will walk out the doors for the last time as the school’s leader.