Need Recommendations For Middle School

Hi all, thanks in advance for your help.

My wife and I are relocating to Asia during the next few months and are looking for a school in our around Bangkok in which to place our twin 12 year-old daughters beginning in August. My wife is Thai and my daughters were born in the US and speak very little Thai at this point but we'd like them to learn. We'll be paying for the schooling ourselves so we need a school that's affordable also offers an American and/or IB curriculum.

So far, I've looked at the websites for KIS International School, New International School of Thailand and a few others. I like the looks of both schools but I don't think we can afford NIS, so I'm looking for input on KIS and any others you experts might recommend.

Your advice is greatly appreciated!