Trends in International Mathematics and Science Study, 2015
The Trends in International Mathematics and Science Study, 2015 (TIMSS 2015) is a data collection that is part of the Trends in International Mathematics and Science Study (TIMSS) program; program data are available since 1999 at <https://nces.ed.gov/pubsearch/getpubcats.asp?sid=073>. TIMSS 2015 …