Good for you for taking the proactive approach and workinghard to change your family's situation. It sure isn't easy!
A couple of suggestions:
- Corporate trainer: Best job i ever had and a heck of a lot better paying than teaching (with really good benefits). Target larger companies -- not small, "mom & pop" shops. And with all the advancements in technology, don't limit yourself to businesses in your immediate area. More & more of this is done via telecommuting.
- Private tutoring: With a good Math & Science background you can really make it work for you. Right now, I'm paying a calculus tutor $75 an hour. It's a huge expense, but I can't believe how much help it is for my daughter, so I scrimp in other areas and write the check with a smile. I know a ton of good kids who could use help with HS science & math!
- College prep: In our area there are specialists you can hire to help your child navigate the college prep, selection & application process. In turn, these people use contractors to help kids edit essays (Note: they don't WRITE the essay), college interview prep and more. Also, these people are wonderful at networking and may know how to help leverage your education experience outside of the classroom.
For benefits & such, a corporate job would be better than a private contractor, but the others may be options to get you started.
Good luck -- and go for it!