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) 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