Before revision: The Berlin Model (Berliner Modell) ( also known as “Teaching-learning theory of edcuation" (lehr-lern-theoretische Didaktik) was developed by Paul Heimann (1901–1967) .
After revision: The Berlin Model Berliner Modell) ( also known as “Teaching-learning theory of edcuation" (lehr-lern-theoretische Didaktik) was developed by Paul Heimann (1901–1967) .