Wait List depends on the school, so your first step should be to identify the school(s) that you are interested in. If you have an expat package, some of the schoools (outrageously in my opinion) allow you to bypass the list on payment of a sum of money, and maybe the employer will help with this. All the
International Schools have a good standard of English, but bear in mind, putting your kids on the waitlist means, in most cases, a non-refundable deposit and pretty expensive fees. Best place to start is the links, as has been pointed out, then do a search on the forum with the selected schools names, should turn up a gold mine of information. My five year old just started
International School.