Where are you teaching now? Asia, Latin America,....?

Also, do you really want to quit and go back home or quit and find another teaching job in the same country?

I wish I could say "If you want to head back home, just pack up and head to the airport. No one will care, really.", but I can't. I don't know your situation. For one thing, what is your housing situation? Is your housing provided by the school, or did you have to rent a place on your own, meaning you had to put down a deposit? If you put down a deposit, more than likely you'll have to fulfill your housing contract obligation if you want the deposit back.

Here's a 'sidetrack' morsel for your own heads up: I'd NEVER put down a big deposit anywhere if I were renting a place only to work in ESL. You just never know for sure if it will work out long enough to get the deposit back. I know of people who rented, put down big deposits, went to work as ESL teachers, and quit after the first week. They lost their deposits because they had to move somewhere else for another job. Nice move. Idiot move, actually.

Also, are you contractually obligated to give a notice if you want to quit? Some places want a month notice, some places want a notice and then want you to stay until they find a replacement for you, which could be six days or six weeks. This may mean something if you want to keep on teaching in your present host country.

With that said, know that no one is forgotten more quickly than an English teacher. Turnover and teachers quitting is a reality most schools have become accustomed to. If your school is taking care of your housing situation, take your work permit back to the government office from whence you got it, fill out the forms if you need to fill out any, and then head to the airport. No one can force you to stay on the next six months. Just be sure you don't screw yoursel if you DO bolt.

Good luck.