I'm American. By the time this question will be relevant, I will have 2 years ESL teaching experience in Korea (I have one now.). But I do not have an education degree or any kind of ESL teaching certificate. (My major was media communications (mostly journalism stuff).
What would I have to do to teach ESL in the public school system (specifically around St. Louis, MO)?
Is it possible they'd hire me as is? Or could I go through one of those intensive 4-5 week programs and then get hired? Or would I have to get a masters in education?
Thanks!

yes u do

You do need to have the proper qualification: degree, TESL valid certificate, etc.

if you have a background in journalism then you might be able to apply that. the school district that you apply with may ask you to take a test and see what your knolage of ESL is.