What happens to the self-esteem and self-concept of children as they transition from elementary to middle and high school?

Self-esteem tends to drop during middle school, probably because of physical changes brought on by puberty and the less personal nature of middle schools. But self-esteem rises again during the high school years- to a greater extent for boys than girls (Matsumoto & Juang, 2012; Harter, 2006; Seaton, Marsh, & Craven, 2010).