Help me with Spanish and I will help improve your English

Hi,

my name is David and I am doing an Au Pair in a small town outside of Barcelona.  The family I am staying with are usually speaking Catalan which I find interesting but I also wish to improve my own Spanish.  I know that a lot of people here would like to improve their English so I can make an offer:  I will help you improve your English if you can help me with my Spanish!