What are the best Thai language schools in Bangkok for expats on DTV?

I went to the knowledge for two years. It was a good foundation. I moved on to one on one tutoring to keep improving past the level they teach but I don't regret going there for beginner and immediate Thai.

I completed the program in both Duke and ALA schools. They are BOTH solid and have great teachers. Duke is challenging but you learn Thai at the most fluent level. ALA is a bit more geared towards older foreigners and I found the program much easier. - The full story is I paid for the full 14.5 months at Duke while I was on a different visa and began attending classes on the old visa.... and I flunked after two months. I bought the 14.5 month package from ALA and started my ED, and completed the full program. Since I had already paid for the Duke program I decided to go back and take it as well. I was tested out in their six month class (the fourth one?) I can't remember. But I went ahead and took classes for another six months and passed pretty well. I think there's still one more class I can take. I highly recommend both schools, depending on what you want. If you just want the visa then choose ALA, you WILL be challenged though and you must attend classes and take it seriously.

Try Dukes. They are great

Chulalongkorn Intensive Thai

Dukes is really good