What are the names of some good Thai schools in Bangkok?

I am working in Thailand and want to find a good Thai school. I would like the names of some good schools, a few reasons why you liked them and their location or URL so I can check them out for myself. Ideally I'd like answers from people that have actually studied there. I am mainly looking to improve my spoken Thai rather than read/writing, but dont mind a little work on that, but mainly schools focusing on spoken Thai. Thanks