Violeta and Bee--
This seems to be a very tough kind of problem. In California, I would not be allowed to teach in K-12, although I taught the teacher training courses in university because I do not have a teaching credential. The Schools of Education have spent years making sure only they have control of who teaches. As a result, it takes 3 semesters beyond the Bachelor's degree (4 years of college) to obtain a Credential. Thus, many potentially good teachers don't want to jump through the hoops, and they go into other fields of work instead.
I could submit a petition to the Dept of Education, with accompanying documentation, and (after paying a fee, of course) hope that it would be accepted, but I would still probably be required to submit to several courses of supervised teaching. Funny, isn't it!
Somewhere there must be a serious politician who would undertake to pass legislation to change these situations, but let's face it, there isn't enough "pork" in the barrel to make education a worthwhile enterprise for most. And the teachers unions are really against any changes that would make their Credential less valuable.
The only quick solution I can see is online education. There are a number of accredited schools that can accelerate the process--this includes Bachelor's degrees, higher degrees, and even teaching Credentials. Usually, they are quite costly. But if the American economy dissolves (as it looks like right now!), maybe the dollar will have so little value that these online degrees would become cheap for you.
I don't know whether to hope or despair 
--Elizabeth