Abstract
The <em>IQB Trends in Student Achievement 2018</em> is a nation-wide large-scale educational assessment using a trend design. The study includes achievement tests on mathematics, biology, chemistry, and physics as well as background questionnaires for students, their parents, subject teachers, and school principals. The datasets include data of 51.511 grade-9 students from 1.473 German schools assessed in 2018, data of 5.026 teachers, and 1.264 school principals. The 6 datasets and the study documentation are available via the Research Data Centre (FDZ) at IQB and include a wide variety of constructs such as achievement estimates, indicators of general cognitive abilities, motivational and socio-emotional constructs as well as data on social networks.
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