For Thai cooking skills, SITCA is the place to do it, with daily Thai cooking classes and courses in the aristocratic Thai art of carving fruits and vegetables into intricate floral designs. Lunchtime classes begin at 11am, while dinner starts at 4pm (both are three-hour courses with three or more dishes).
Included is an excellent tutorial about procuring ingredients in your home country. Of course you get to eat your projects, and can even invite a friend along for the meal (for an additional 250B). Complimentary DVDs with Thai cooking instruction are also available so you can practise at home.