My family has had several teachers among them.
On just the Allison branch of the family there was a teacher in 5 generations ... My great-great grandmother {Catherine "Kate" Mumma-Omelia (1848-1935)} ... my great grandmother {Etta May Omelia-Alliosn (1872-1944)} ... my grandmother {Oma M Allison-Rammel (1895-1995)} ... my aunt {Catherine "Katie" Ann Rammel (1928-2017)} ... and myself {William "Bill" Dale Sims (1941-....)}.
Kate and Etta didn't have or need to have a college degree in those early days ... but they were both certified teachers as required at the time.
Oma and Katie had the proper level of college to be certified in the later years.
Oma taught long enough to have been the 1st grade teacher for several generations.
Oma also received the Outstanding Alumni Award for her contribution to the school system and many children in Assumption, Illinois in 1978. Here is a photo of her with the plaque.
Below are a couple of articles about her retirement
I must admit that I was not a full time teacher. In the late 1960s the computer world was in its infancy. I got in early. So I taught part time at several different universities over the years ... University of Dallas ... SMU ... St Edward's University ... University of Texas