It's not just about getting a job. They are doing their due diligence about you unless they are desperate for a teacher.

You need to make sure it's a good fit for you. A year is long time to waste being unhappy and could potentially hinder future job searches.

With all jobs, even the "good ones", you have to make sure it's going to be in your best interests. Don't be afraid to ask tough questions in the interview and really focus on their answers. Don't be afraid to ask around and find the truth about the situation. The good and the bad.