Although I do not teach for a living, I have tutored other people. While in college, I tutored other students in various courses including Calculus, linear Algebra, and Physics to name a few. I also tutored and was a Graduate Assistant in a few Electrical Engineering classes such as Circuits 1 and a few labs as well. I have a Bachelors and Masters in Electrical Engineering and I am currently employed as an Electrical Engineer. Math and Science is what I have known all my life. I assure you that you are in good hands. As far as teaching baseball, I played for a Division 1 team in college.
It is a certification that I passed the Fundamentals of Engineering exam. This is the first step before acquiring a license in professional engineering. It tests your knowledge in Math and Electrical Engineering heavily.