Berger, K.S. (2015). The developing person through childhood and adolescence, 10th Ed. New York, NY:  Worth Publishers.

Johnston, T., Snyder, K., & Wooleyhand, C. (n.d.). National Association of Elementary School    Principals: Serving all   elementary and     middle-level principals. Retrieved June 02, 2017, from

Lehman, J. (2017). Child Acting Out in School: What to Do. Retrieved June 03, 2017, from