There are about 4 dozen schools that are part of QSI. Recruitment mainly takes part at the beginning of the year. Like other job fairs, you'll have to pay a small fee, though it's worth it since you can interview with several schools. Many schools prefer teaching couples, so be aware of that when you apply.
Got an idea for a job site?
Email me with your job site, name, and website (if you have one) and I'll post it ASAP.