I'm doing Texas Teachers. It isn't difficult.
But why oh why does your wife want to switch to public school? I am in my 4th week teaching at a public school, and it is nothing like I imagined. I'm regularly putting in 12-16 hour work days, and I'm still not getting everything done. Granted, I'm a Chemistry teacher and the sciences involve a lot of extra lab testing and set up time, but still. Public school is no picnic. I am balancing 200 kids - with about 30 SPED, 13 504 students, a few alternative school kids, a home bound student, and a sprinkle of non-English speakers. I have to create multiple lesson plans for every lesson I teach. I won't even talk about grading. Public school requires many, many modifications and accommodations. It's a huge struggle, and I likely won't return next year. Industry was much easier.
Stick to private school.