U.S. Technical Report and User Guide for the 2019 Trends in International Mathematics and Science Study (TIMSS)
Laura Egan, Judy H. Tang, David Ferraro, Ebru Erberber, Yemurai Tsokodayi and Pat Stearns
National Center for Education Statistics (NCES)
10/2022
https://nces.ed.gov/pubsearch/pubsinfo.asp?pubid=2022049
Δεν υπάρχουν σχόλια:
Δημοσίευση σχολίου