Flexibility is an important component of physical fitness and good health. Regular training can result in flexibility improvement. The amount of flexibility a person should develop is open to question, but minimal levels seem necessary to optimal performance and prevention of injury. (CJ)

"The Animal School" provided a powerful metaphor about the importance of individual differences. Nearly half a century later, this article revisits the classic educational tale. It articulates a number of specific changes that schools need to make to be able to meet the physical development needs of all students. (Author/MKA)

Physical development should be classified using a multidimensional hierarchical model. Optimal physical development combines physical fitness and skill development. The paper discusses the history of physical fitness, hierarchical nature of fitness, and specificity of fitness, stressing the need for collaboration in facilitating optimal…