Re: When to say 'no'. I'm in Japan.
Here, school is year round and about half the jobs are at 'cram' schools (which are after school private classes.) Most contracts, bot public and cram schools, pay between $2,500 to $3,000 (USD) per month. There is almost no difference with qualifications. University contracts pay more - about $5,000/month (I believe.) All the contracts are paid out year round, generally with vacations off. Some schools make you go even when there are no classes.
Those are the salaries for teachers under contract. If you have a visa that allows freelance work, then you can do better than that, but you have to find the work. (Hourly rates are better than salary.)
Sorry, I'm not sure what the conversion to Euro is. |