Have you gone back to your school to thank that teacher?
There is nothing quite like the feeling that comes from being a good teacher; whether it's guiding children to a better understanding, sharing one's passion for a particular topic, compensating for a child's tough home life by caring a little bit more, or helping a student develop a growth mindset when they say they'll never understand fractions. Being part of a classroom full of children for a year is an amazing experience.
It's not easy though, if you want to do it right. It' not something you can do by reading a book, taking a single course, spending a year in a classroom with a practicing teacher or just doing what comes naturally. Being a good teacher and getting the most fulfillment out of it involves a rigorous, challenging but incredibly rewarding intellectual process of thinking, reflecting, acting and developing the professional dispositions of a teacher. It involves having a good understanding of what you will teach, a practical grasp of how children develop and learn and the accumulation of a toolbox of teaching strategies you can call upon when needed.
A great place to do this is in the undergraduate or graduate programs at St. Michael' College where theory and practice are integrated in a way that enables you to be the best you can be.