The following information is all about Working Hours in Korea. Don't forget to get your TESOL Certificate before leaving!
Working Hours
Most institutes require foreign instructors to teach 5 to 6 hours a day, Monday through Friday, and some ask instructors to teach on Saturday mornings as well. University departments usually require instructors to teach 10 to 15 hours a week, and to participate in student activities and in the editing of school newspapers. Research institutes usually require instructors to work 40 hours a week and do occasional overtime without compensation.
This information is provided by the government publication Teaching English in Korea. Please refer to it for the latest updates.