00504nam a2200133Ia 4500008004100000100002300041245013200064245006700196260004000263260000900303300002200312650001400334650002200348170224s9999    xx            000 0 und d  aMarlen Goldschmidt  aInstructional efficiency of different discussion approaches in an outreach laboratory: Teacher-guided versus student-centered    cMarlen Goldschmidt, Franz-Josef Scharfenberg & Franz X. Bogner  bThe Journal of Educational Research  c2016  a109: Pages: 27-36  xEducation  xSpecial Education