How much can we boost IQ and scholastic achievement? By A. R. Jensen.--Inadequate evidence and illogical conclusions, by J. S. Kagan.--Has compensatory education failed? Has it been attempted? By J. M. Hunt.--Genetic theories and influences: comments on the value of diversity, by J. F. Crow.--The future of individual differences, by C. Bereiter.--Piagetian and psychometric conceptions of intelligence, by D. Elkind.--Heredity, environment and educational policy, by L. J. Cronbach.--A letter from the South, by W. F. Brazziel.--Reducing the heredity-environment uncertainty, by A. R. Jensen.