Ehmke, TimoTimoEhmkeDrechsel, BarbaraBarbaraDrechsel0000-0003-1454-3658Carstensen, Claus H.Claus H.Carstensen0000-0002-5736-46952019-09-192014-04-3020100191-491Xhttps://fis.uni-bamberg.de/handle/uniba/4099engEffects of grade retention on achievement and self- concept in science and mathematicsarticle