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"The Third International Mathematics and Science Study (TIMSS) is the latest, most ambitious, and most complex in the series of international studies of student achievement undertaken by the International Association for the Evaluation of Educational Achievement (IEA). The current study, under development since the late 1980s, is designed to measure the mathematics and science achievements of students in the early, middle, and final years of secondary schooling and investigate differences in curriculum and instruction ... TIMSS seeks to measure the home background and classroom environment of students in all three populations, as well as the nature of the mathematics and science curricula intended for, and presented to, each population. It also seeks descriptions of the classroom, schools, and national contexts within which education takes place"--P. 1 of technical report.