How can I get a teaching job with a bachelor's degree that's not in education?

Its called alternative teaching certificate or emergency certification. look up your state education agency and they should list the requirements. Also, if you want to go through a college or university there are typically masters programs that also give a teaching certificate. There is a program called "Teach for America" that is for people who were not education majors.

I hope this helps

I agree with Terry about not going for a 2nd degree (multiple degrees are not necessarily advantages in teaching). In addition, you would likely find yourself duplicating many courses, particularly the historical and theoretical ones, and that is quite expensive here in the US. I would take the GRE (or whatever grad school entrance test a program requires) and enroll in a graduate program, because a masters degree is becoming more of an expectation for teachers anyway. The graduate program will review your B.A. transcript and tell you if you need to go back and take any undergraduate (i.e. bachelors) courses, which you are free to take anywhere at an accredited college or university and which you can take simultaneously with graduate (i.e. masters) courses. I'm not sure what you mean by "better job." Principal is not a better job; it's an entirely different job with different academic preparation and requirements, and should not be considered as a the next rung on the career ladder. Frankly, you couldn't pay me enough to become a principal. ;) As for teaching, the work is the same no matter where you go; it's the location that makes one better than another. What makes you a stronger candidate in the "better" (i.e. higher paying) areas is experience, GPA and/or Praxis scores, how well you interview and -- yes, sadly -- who you know.

I'd say most, maybe even all low income school districts have programs that take people with bachelors degrees and put through a graduate program while they begin teaching. The teacher has to sign a contract to teach for a certain number of years as part of the deal. Just go to a low income school districts website and browse their site.

http://www.kckps.org/fellows/

The above link is from my school districts website and explains how the program works in KS.