What a lot of people don't realise about the J1 is that you don't need to instuct at the same school that sponsored you for it.
That's probably true in theory but as nh2301 says not quite how it works. NAIA allowed students to work at other schools but went out of business a few months back owing various people money. Secondly, other schools are not so accommodating and insist that you can only work for them. This was the attitude of my school.
The J1 leaves students exposed to the corrupt management at certain schools.
Very true of the school where I trained and worked. Overall, knowing what I know about the J1 and my own experiences I could not recommend any of the issuing schools. They are either cowboys or very expensive.