TeacherFinder

I've worked with a few similar student->teacher matching organizations while I've been teaching and TeacherFinder has been by far the most effective and communicative. Their matching is efficient and they've always been quick to communicate and interact.
So far all the students I have met thru the programme have been pleasant and (importantly) self-motivated.
You lose the benefits of having a school structure with resources and classrooms, but what you gain in flexibility and independence of teaching are more than worth it.