12-month contracts are in a minority
An 11-month contract is real good if you can get one because most are around 9.5 months - so if its 10 it's okay! Virtually every teacher I've ever worked with in my 53 teaching positions has told me that their last school or agent paid on a 12-month contract, only later to confess that it was not in fact a year's contract but often a school year's contract, which is around 9.5 months. All that glitters is not gold. I once answered an advert on Southeast Asia's most prominent teaching website, (True International, 50,000 baht, 12-month contract) however at the interview it turned out to be 34,000 baht on an 8.5 month verbal contract.
Richard Constable