The Lehrstücke (eng.
teaching pieces): "Plays that should provide knowledge instead of experiences" (
Bertolt Brecht)
At the end of the 20s, Bertolt Brecht began writing didactic pieces specifically for students in which problems of society were presented. Students from 11 to 20 years-old were presented the works and asked for commentary, improvements, changes. In working through the plays, they came to understand the problem at hand in a way deeper than would normally be expected.
Note: all translations my own