With school districts' increased dedication to raising academic standards and abolishing social promotion, tremendous pressure has been placed on teachers and students to raise standardized test scores. While this may appear admirable from afar, its practical and real-life implications are not often as glowing. In fact, the push toward higher standards often leads to tracking, ability grouping, and grade retention-all of which have inherent problems. Tracking, grouping, and retention are widely practiced in the United States and in many other countries, and they are founded on both theory and research. Tracking, most often practiced in secondary schools, groups students into courses or sequences of courses of various levels of difficulty suited to their levels of achievement. Ability grouping, most often practiced in primary schools, assigns students within classrooms to homogeneous groups of like ability. Grade retention requires students who have not attained achievement standards to repeat one or more grades. All three practices are based on the belief that children of like abilities or levels of achievement can learn together more efficiently than can heterogeneous students. Other theories and research suggest that these practices may be inefficient and unwise. Some argue, for example, that students retained in grade may suffer declining self-concept which may deter their progress so that they are less likely to catch up with grade level standards. This is due, in part, to the fact that, by itself, grade retention does not address the causes of academic failure. Others counter that, to the contrary, such students would eventually fall further behind and drop out whether or not they were retained. To "socially promote" ill-prepared students would depreciate the value of the high school diplomas of those who meet rigorous standards. Similarly, some argue that it is more