Losing self-control is costly. In the aftermath, a teacher wilts with shame or embarrassment. In truth, teachers may be unwittingly susceptible to rash behavior, not because they are inherently ill-tempered people, but because they are biologically wired to respond unthinkingly to perceived threats. Thanks to the evolving field of social neuroscience--the study of how relationships affect every cell in the body and how one's brain/nervous system affects one's relationships--teachers now know more about what causes blowups and what they can do to prevent and ease out of them. Neuroscientific terms describing the brain might seem dry and irrelevant to early childhood educators. However, staying informed about the internal processes enables teachers to make wise choices and frees them from falling into repetitive unproductive patterns.