The game that I have the most success with is Pictionary.
I pick out words from their book. The words from the current chapter are 'Difficult' and words from the previous chapters are 'Easy.'
I type out the vocab (with the Korean translations) in Word so each word is in roughly a 3x3 square. I then print them out and cut out the squares so I have a deck of cards more or less.
I put the class into teams based on their seating. Row 1 and 2 are Team One, Row 3 and 4 are Team Two, etc.
Team One goes first and one kid from the class comes to the front of the room.
I great him with a handshake and make some small talk. I ask about the weather or if lunch was delicious. Etc.
Difficult words (from the current chapter) are worth points from the wheel (more on this later) + 1 and you get 60 seconds to draw. Easy words get points from the wheel (no bonus) and 60 seconds to draw.
The wheel I'm referring to is from Barry's Fun English:
http://www.barryfunenglish.com/tools.php (scroll down to the bottom of the page - scoreboard with spinning wheel)
The timer I use is on that same page.
I show the student a word based on their difficult or easy decision. I start the time and they draw. Only their team can guess (the other students must be silent.)
If their team guesses the word correctly they get points from the wheel. I allow the student who guessed the word to decide whether the spin is 'soft, medium, or strong.'
If the team doesn't guess the word the other teams get 1 attempt to guess it correctly. If one of the team guesses it they get the points from the wheel.
If you want you can make a Final Round with phrases taken from their book. For this round you might award double points.
I think this activity words on many levels.
First, because I include the Korean translation in the clue card the artist need not totally understand the English vocabulary word. And because an entire group is trying to guess the word there is a great chance of success. I like it when an activity is fun and challenging but is designed in a way so the students have a good chance to be successful.
This activity works best if the students have already been introduced to the vocabulary words. I try to play this game after the Korean English teacher has taught one or two classes on the lesson.
Just to note - the scoreboard wheel is a bit tricky to use. Make sure you look to see what team is going to be awarded the points based on the spin. If a team doesn't get the answer and you need to give points to another team you will need to manually toggle to that team. You can manually add or subtract points if there is a problem - but you should practice with the wheel before you actually use it in class.
Attached is a Word document with a sample from my Grade 2 Middle School class and the PPT I use to explain the game.