This online certification program looks pretty painless if you are going that route. getting another bachelor's degree is the biggest hurdle for 2nd-career teachers.

Every once in a while I think about it...

http://www.wgu.edu/education/teacher_certification

Basic Tuition for Most Programs is Just $2,890 Per Six-Month Term WGU charges tuition at a flat rate every six months, so you pay for the time, not the credit hours. Compare that with what other reputable, regionally accredited online universities charge, and you’ll discover WGU tuition is typically half the cost.