Eddie & Yana

If you are talking about high school, then as long as the school is SEVP accredited yes you can do it. See here for information https://www.usa.gov/study-in-US#item-213539
 
And yes, work visas are far more complicated. Employers need to sponsor and for non college graduates very difficult. She may want to look into something like a J visa for an au pair as another option after she finishes high school, I think those are usually for around 2 years. https://j1visa.state.gov/programs/au-pair

And for au pairs, among others (including summer jobs, camp counselors etc). Feel free to look at the official link I gave them.
 
 

So sorry for the confusion! I meant she was approved for a 10-year visitor visa, not a green card  Thanks so much guys!

So we ended up filing TWO I-134, one for my wife, her daughter, and me, her son-in-law. She was approved for her 10 year green card! We were thorough in our records, and we taught our mom the Thai phrase for “everything you need to know, my daughter put in these papers” she literally answered almost every question with that phrase. They went back and forth for a while, then they allowed my sister-in-law, who speaks Thai, to come in and answer a couple of basic questions in Thai. 
 
It it sounds like we were extraordinarily blessed in this situation. We are grateful!!!

Awesome, thank you so much! That's a huge worry off my chest. I can't imagine a more horrible thing to happen is for a legitimate marriage to be denied by missing something unavoidable. I've met so many people through conversations that know people who did the illegitimate marriage thing to get into the country, and I've told them how hard they're making it for people who are legitimately trying to do this. Thank you for all your help and encouragement!