A comparison of the educational and occupational aspirations and expectations of 900 seniors in four Chicago high schools showed that college prep students had the highest educational and occupational aspirations and expectations. Vocational students had the greatest discrepancy between occupational aspirations and expectations, while general education students showed the least discrepancy between aspirations and expectations on either job or educational variables. Data, acquired from a student aspiration questionnaire, raw scores on a reading achievement test, and information from student records, also showed that achievement scores have very low correlations with expectations, but other achievement indices, like class rank, have higher correlations with expectations. Students with higher expectations for education and jobs are more active in extracurricular activities and take more mathematics courses. (Tables show the relationship between educational aspirations and educational expectations, occupational aspirations and expectations, correlations among variables, and reading test scores for the students from a large vocational high school, an all-black school in an economically depressed neighborhood, a school with an economically and racially diverse student body, and a white, middle class high school.) (KC)