Commentators from Bill Crosby to Barack Obama have observed the phenomenon of black schoolchildren accusing studious classmates of "acting white." How did this contentious phrase, with roots in Jim Crow-era racial discord, become a part of the schoolyard lexicon, and what does it say about the state of racial identity in the American system of education? The answer, writes Stuart Buck in this frank and thoroughly researched book, lies in the complex history of desegregation. Although it arose from noble impulses and was to the overall benefit of the nation, racial desegregation was often...