Social essentialism, the belief that members of certain social categories share unobservable properties, licenses expectations that those categories are natural and a good basis for inference. A challenge for cognitive developmental theory is to give an account of how children come to develop essentialist beliefs about socially important…

Although afterschool programs for children have been operating for decades in some communities, the afterschool movement--the great national awakening to the opportunity afterschool offers--is just a few years old. As public demand for afterschool has grown, so has the demand for accountability. That is particularly true in afterschool programs…