I have had a lot of interview experience for International Schools. Of course, expect the usual questions like 'what kind of teacher are you?'...or 'how do you plan a lesson to make sure the more able in the class are challenged?' but mostly, they want to know if you will fit into what they want. All schools are different. Usually, International Schools demand a lot of extra-curricular time from you - after school clubs etc. Be prepared to sound useful and flexible for their needs. They may also ask you something about how you handle difficult parents - often in Primary, you get a number of parents who seem to watch you like a hawk, gathering information on what goes on in your lessons etc. Above all, be positive in the interview, never moan or complain about your current job or situation. Good luck!