If I may join in .....? ......I have 2 sons ...both in kindergarten 1 and 3 .....I have been a teacher of English and science for almost 10 yrs at a local school level / Private / and International school........ This is what I see in an "EP" program school .................Your childern will pick up the English language from their "TEACHER(s)" ...for sure !....But.........it won't be as much as you might have wanted or expected ........yes, it will be more than what your child will get from a local or Gov. type of schools ...........but here is what you have to understand.......in an "EP" program / schools .....98 % of the Students in that school will be Thai ...........the other 1% may be mixed ....and 1% "farang" :) .............That 98% of the students that your child will play with and get to know ..."I am confident to say that They won't be TALKING and PLAYING in ENGLISH" : remember that a child learns best thought "Play" and "Socialising"..... Very VERY rare and lucky that you will find another child that can speak or uses the English language to communicate to your children (and, Never asume that a half Thai / farang child are able to speak in English!!!!!------never judge a book by it's cover)...........
As for me .....I have sent my sons to an "EP" program with a LOW ...expectation....due to fact that I was a teacher at a Private "EP" program for many yrs. and I have seen so many things and know what to expect from these type of schools ......... There are "NO" .....Good and BAD of these type of program ........I have often say this to other parents ......."Teachers" are not wizards and migicians.....They can't do Magic by turning your child into a fluent Muti -language communicators...................."Everything starts from HOME"........"you" as parents must be consistance and strong with your "teaching" ....know your "Aim" and stick to it...........don't get lazy or "Shy" (in the eyes of the Public......or your child will feel the same) ...........If you are a Soldier ...I would say to "LEAD by examples" !!!!..........and don't RUSH the process.....your children have almost 20 more yrs. of life in School ........!