Among 1,012 Nigerian ninth graders in 40 schools, girls in single-sex schools had higher mathematics achievement and less stereotypic views of mathematics than girls in coed schools, whereas boys in single-sex schools were negatively affected compared to those in coed schools. Contains 46 references. (SV)

Cross-national data on 14-year-old children in England, Sweden and the United States are analyzed for sex differences in achievement and attitudes in science and reading. The study identifies school characteristics that are associated with large sex discrepancies. Tables are included. (Author/JLF)