Hi Raggamuffin - thats a good salery for a language school, so should be pleased about that. Stickman (
www.stickmanbangkok.com) has writen extensively on teaching in Thailand and check out
www.ajarn.com for teacher to teacher info.
I'm not sure about Bangkok schools in particular - but in Phuket basically have 4 types of school -
1) Thai - follow Thai curriculum in Thai - free to age 15.
2) Thai curriculum with extra english and better (?) teachers - small fee payable, many better off Thai's choose this - its around 10K/year.
3) Bilingual School - These schools follow Thai curiculum but in English tought by foreign (english speaking) teachers and also a Thai teacher - I send my kids to this kind of school - 80% English and 20% Thai - aprox 85k/year.
4) International Scoool - follows IB/US or international GCSE (UK) curricular - but very expensive - tought by foreign (english speaking) teachers - fees 300k/year +.
It would be good if you could persaude your employer to take your kids into the school there - or at least a discounted rate.
Good Luck