I consider myself an amateur Watchtower history buff. I have always read that Maria Frances Ackley Russell, Charles Taze Russell's first and only wife, went to a teacher training college and was a teacher for a number of years before marrying Russell. But, I have never seen proof that she truly did finish college and became a certified teacher. Here is proof! This is significant because it is proof of how much more educated she was than Russell, a man who would go on to create an organization that rallies against higher education.
Maria is certificate number 660.
Source: https://books.google.com/books?id=5uMBAAAAYAAJ&printsec=frontcover#v=onepage&q&f=false