Psychology of education
On the field of psychology of education in Germany A. Renkl did research about Learning by teaching almost without referring to Martin. In his publication 1997 he briefly quoted Martin but in his article from 2006 in the Handbook of psychology of education he just quoted English articles. Eventually he comes to following judgment: "Regarding Learning by teaching the publications shows partly very euphoristic judgments about Learning by teaching (...). Considering the empirical researches this statements must be estimated with caution. Learning by teaching may but doesn't must work successfully." And further: "Thus further researches have to consider above all the utterly important practical and theoretical question, which conditions have to be given in order to reach good results using Learning by teaching as teaching method."