This study examines some teacher sociodemographic factors and school characteristics that may influence teachers' identification of gifted students. Teachers initially nominated a sample of 505 students aged 7-17 years (M = 11.51, SD = 2.07), but only 359 completed a general intelligence test and 225 reached the minimum percentile to be considered potentially gifted. Only 20 of these had a previous diagnosis of giftedness. Results show that the teachers' identification had a sensitivity of 63% and that the teacher's sex and the type of school significantly influenced the identification of giftedness. Female teachers and teachers in private schools made more accurate identifications. There was no evidence for the influence of school setting or the educational stage.