High School and Beyond is a national longitudinal study of the cohorts of 1980 seniors and sophomores in the United States, intended to provide information on these students through early adulthood. This base year student file, a machine-readable data file (MDRF), is the first information available from the study. It includes information on 58,270…

The Twins and Siblings study is available in a machine-readable data file that is part of the High School and Beyond (HSB) Class of 1980 Survey, administered in 1980 to a national sample of over 30,000 sophomores and 28,000 seniors from 1,015 high schools throughout the United States. This file contains data from 616 sampled twins and triplets…

The Second International Mathematics Study (SIMS) of the International Association for the Evaluation of Educational Achievement (IEA) was conducted in 20 countries on two sampled populations: Population A of 13-year-olds and Population B of students studying mathematics in their final year of secondary school. Mathematics achievement was measured…

The "High School Senior Cohort Study for 1965 and 1973" is a two-part machine-readable data file (MRDF) containing background information about the social and political climate of the peer groups and the entire senior classes of the high school students interviewed for the "Student-Parent Socialization Study, 1965" (ICPSR-7286). The schools in…