Hey Maudib,
I'm teaching in a highschool, but I've definitely felt your pain!!! It's true, there are some students who will just never be interested in your classes. Not much you can do there except make sure they are not disrupting the class so that the good kids can still get something out of it.
The classroom set up we work with is also not conducive to language learning, so you've got that fighting against you as well. How do you make sure that 30-40 students are practicing speakingand listening, let alone saying things correctly in a 50 minute class???(I work in the online program in Jeollanamdo as well and wow, what a world of difference working with 5 students and a co-teacher vs 40 students on my own). My Advice if you want it:
- Stay positive, and focus more on the praise. I almost never lose my temper so when it does happen, it really surprises the students. Use your positive nature to that advantage. If you're always hollerin' they don't care.
- Give attention to the kids who are trying, if the class is doing a worksheet walk around the class and read some of their work, encourage and comment on the work of the kids who are on task. TALK to them. (I've found some of them are starved for attention and as soon as they realize they can have face time with me if they are working on their worksheet, they knuckle down.)
- I also use a bulletin board to post the best work I've seen and it works really wellasd encouragement and bragging rights.
-switch it up: mix up lessons that encorporate videos, music and games so that you're hitting all the learning styles you can and the kids are wondering "I wonder what we'll be doing this week?".
- use culturally relevant stuff. My most successful classes have been when I take a piece of Korean Culture and talk about it in English with them (The Korean Flag lesson on this site is a really good example, I also did a comparison lesson with Chuseok and Thanksgiving that was really successful) Expalin to the students that if they know how to talk about Korean things in English they can share their culture with foreigners. Plus, when they already know it in Korean, the lower students can back-translate what your teaching and understand more. Plus, plus, you'll learn alot and the students will be really impressed that you have taken the time to learn about ehir culture.
- DON'T beat yourself up. Remember that this is just one class and the rest are good, which means you are doing a good job. We can't have success with 100% of our students but we can have huge successes with many of them when we narrow our focus just a little bit. I'm sure you know there are some korean folks who don't think the country should be learning English and don't think the government should be spending money to pay foreigners to teach it to their kids. You may have a few kids who are the children of these folks.
Keep your head up - Don't forget you've got way more students who are learning from you and enjoying your clases than not!