I am a high school teacher looking for current movies that I might show scenes from that I can show students different strategies to solve conflict... i.e. good communication

Night at the museum had several conflicts and was solved with communication.

Unfortunately your question might act as a SPOILER for some movies, since conflict is often resolved at the end.
Anyway, The Day the Earth Stood Still (2008) (http://www.imdb.com/title/tt0970416/) was all about blasting what we fear and don't understand, and then was resolved by a nice friendly chat.

To put some humor in it, if appropriate, there's:

Anger Management Synopsis (http://www.fandango.com/angermanagement_v276390/summary)