Dangers of the Dictionary in the Korean Classroom

Most Korean cell phones seem to have a Korean-English dictionary.  As mine has helped me communicate in various settings, since many of my students have their own cell phones I've been trying to teach my students to use the dictionary to look up unfamiliar words....

from time to time I've rewarded resourcefulness with a sticker or a piece of chocolate 

Last week, one of the textbooks introduced the words 'worried' 'surprised' 'interested' 'bored' and....'excited' 

When there wasn't enough cell phones in the class for everyone, I was surprised that my students all became so excited about using the actual dictionary.  If I would have known why they were so interested instead of bored, I might have been worried.  

I didn't immediately understand how the word 'pen-is' suddenly popped into the class discussion....several times 

"teacher...pen-is...what?" 

Being prepubescent boys, I thought it occured to them to search for that particular English word themselves 

The following day, two of them walk by my classroom where I was chatting with the other native English teacher and stop by the doorway just to say "teacher, pen-is" 

I told them to say that word to the other teacher.  

They said "noooo! you!  you teach  pen-is"

Oh, I see, they think I taught them that word.

 My guess is that I don't know what all is included in the Korean dictionary entry for excited

• korean classroom
• dictionary
• cell phone as a teaching tool