PISA, PIRLS, and more – The Research Data Centre at the Institute for Educational Progress (FDZ-IQB)
2014 ◽
pp. 500-502
2010 ◽
Vol 42
(4)
◽
pp. 337-350
◽
Keyword(s):
2017 ◽
Keyword(s):
2003 ◽
Vol 55
(177)
◽
pp. 407-415
2017 ◽
Vol 237
(2)
◽
pp. 151-158