Totally disagree that you shouldn't need training. That's just your boss being lazy.
I'm living in Jeju city and if you want I can send you my hard drive of all my teaching plans from the last 5 years. It's about 2 gig's of stuff with games, lesson plans to anything else related to teaching. I've been teaching elementary position so it should help you out.
Also, pay the 15 dollars for barryfunenglish.com its so worth it.