Resiliency is a person's ability to psychologically adapt to stress and adversity in a positive way. As much as we parents and teachers are tempted to pave a smooth road so that our children do not experience stress, it is much more realistic and helpful to foster the skills of resiliency. We can help children develop the habits that will allow them to bounce back.
From the American Academy of Pediatrics: Building resiliency
From All Kinds of Minds: 7 C's of resilience
From Stanford University - Embracing stress is more important than reducing it: http://news.stanford.edu/news/2015/may/stress-embrace-mcgonigal-050715.html
Children's books that promote resilience Reaching In Reaching Out - 7 C's Children's books