The study investigated sex-related differences among first-year algebra students with respect to achievement, attitude, and consumer problem-solving skills. The subjects were 329 females and 294 males enrolled in first-year algebra courses in 17 schools across the country. In the fall, no sex-related differences were evident in arithmetic computational skill or attitude about the usefulness and enjoyment of mathematics. Males showed a slight advantage on consumer items. In the spring, no sex-related differences in algebra achievement were found; a decline in attitude was observed for both groups; and the differences on consumer exercises became more pronounced.