There is a lot of work being done right now on Happiness, Brain Function, and how it can help in education. Brain chemistry accounts for a lot of the way we live our lives, but the interesting thing is that through conscious action we can change or brains! I have attached a TED Talk by Ron Gutman about the physiological effects of smiling; you can literally make someone else feel better by smiling at them – research shows that it is very difficult to frown when you see someone else smiling.
Often a student will be upset or in a bad mood over something from home, a conflict with another student, or that they may not have done as well on an assignment or test, and they refuse to work and need a break. It is always amazing to me by speaking with them and trying to get them to smile (and smiling at them), that their mood lightens and they seem to come out of their gloom.
I tell them all the time, “Change Your Brain, smile!”,…here’s the TED Talk. I would greatly recommend you try his suggestions and report back on your experience in trying to smile for others.