Maxy Fruvous With a Non-OA, you're stamped in for 1 year everytime you enter Thailand. If you leave and reenter on the last day your visa is valid for, you'll still be stamped in for 1 year, giving you 2 years of in country time.
If you're teaching, the Ministry of Education requires foreign teachers to hold a 4 year degree and you need a letter from the MoE to get a workpermit.
You have to go 30 days before you visa expires and apply for a 1 year extension of stay. You'll need all the paper work from your employer and your work permit.