Schools will generally only hire Grade 3 instructors they’ve trained themselves as you are a known commodity. Although it is standardised you know the way they like it done and how there system works. Once you’ve got experience as an instructor moving schools is generally easier. Occasionally you will get lucky and find smaller schools that need an instructor, but again they often have connections with other schools that they like to get there instructors from. Although the school hasn’t done the right thing by you all, did you ever ask the question about the need for 11 new instructors where you were? All you can do is keep going in and asking if there is work, networking and trying other schools.