Can anyone here recommend any agencies for a young student who wish to spend three weeks in August with a host family in Thailand?

Apparently, there are programmes where the student also spend some time teaching English to local children.

This is for a friend of mine and unfortunately, I haven't a clue where to start so if you have suggestions, please let me know. Thanks.

p.s. Mods, please move this if it's in the wrong place.

have you tried language schools (not sure if you call it like that in English)

I tried the Cambridge Institute but they can only do placements in Cambridge, UK.

AlphaSprach Studio in Zurich offers no help at all.