I got beaten to the punch ! Cinderly had most of the advice I was going to give..The A-1 thing I would do is check with the HR people for the district, they will be familiar with both what the requirements are AND what the most needed emphasis areas are. Math and science are normally the biggies and you will be a hot property if you have a degree in one of them. As another poster noted you can get 30 credits by taking the GRE..he mentioned Psych which is prob the best best for quickness depending on the kind of stuff you are good at BUT they offer Chem,Bio,Math and since you have an MIS background Comp Sci. Excelsior has some sort of portfolio evaluation service to earn credits for work experience and with 30 years in a field I would think you could pick up substantial credits. If they are in business/MIS this might be the way to go degreewise in regard to time. Many states require student teaching hours, check with the HR person on this. In our area they are so desperate for teachers they have a alternative licensing program for career switchers like yourself..again check and see if they have one. You might also look at
Teach For America - Home or similar programs as a route to get certified.
It is a personal choice but my advice is to set yourself up to be in the drivers seat even if it takes longer. Coaching as far as the schools are normally concerned is a secondary skill...so if you can fill a slot like math or science you will have your pick over someone with a social science/psy ed degree. You can always get a Masters to add to your resume in something that will help the coaching part of the resume. Why rush into cutting your salary in half

If you are gonna make the move, do it right.
FYI My Mom was a teacher and teacher of teachers for 30 years
Blitz