What classes should I be taking if I want to go to the army and then become a teacher?

Please help because I want to change my classes because right now I am taking engineering class when I want to go to the army and then go to college or trade school and then become a teacher.

I wanted to be a chemistry teacher, preferable at the college or university level. So I took all of the math and chemistry I could take in my four years of college. I proceeded to graduate school and obtained a Master's degree and a Ph D. There are other things you should take, too, because you can't think all day about your major subject. You need to be able to write, you need to be able to speak and enunciate well, you need to be friendly, want to help, patience is needed. I took a number of courses in psychology and I think that helped. Good luck. I hope this helps