A social environment or setting.
The distinction between the constituents in, and the conditions of, the integral life-career of person is well brought out in contrasting the attitudes of attention which persons normally develop with the milieux or social media which serve as the theater for their exercise. […] The assertive attitude of challenge finds its milieux in the domains of sport, art, exercise, industry, etc., to which the conception of gestalt may well be extended.
Confronted by the multiplicity of the milieus that could influence curriculum activity, we need some way of deciding not only what kinds of milieus should claim our attention, but also what kinds of knowledge about them we should attend to.