No, not for any real schools and yes for the tutoring but only if they hire him as a consultant and not as a teacher. The problem with these agencies is, they literally own you and they know that...means they treat you like a slave, many of them will keep your work permit (illegally), don't give you a copy of your contract and stuff like that. So basically you have no rights or security! They can fire you without a reason or just not pay you and so on..