00462nam a2200121Ia 4500008004100000100001900041245009500060245001800155260000900173300002500182440003800207650009500245171207s9999    xx            000 0 und d  aThorsten, Anja  aGenerating knowledge in a Learning Study – from the perspective of a teacher researcher   cAnja Thorsten  c2017  apages 140-154,  2017  aEducational Action Researchv25:1  aLearning Study, teacher research, clinical research, Variation Theory, writing instruction