TY - JOUR A1 - Terhart, Ewald TI - John, Hattie: Visible Laerning. A Synthesis of over 800 Meta-Analyses relating to Achievement (Ewald Terhart) JF - Zeitschrift für Pädagogik SN - 0044-3247 PY - 2011 IS - 01 SP - 136 4 DO - 10.3262/ZP1101136 UR - https://content-select.com/index.php?id=bib_view&doi=10.3262%2FZP1101136 PB - Beltz Juventa CY - 69469 Weinheim RI - ER -