Die Verwendung von Lageskizzen zur Erarbeitung von Textinhalten (The Use of Situational Sketches and Their Relation to Text Content).

The use of situational sketches, drawn on the blackboard or shown by an overhead projector, is seen as more effective than ordinary illustrations. The procedure is particularly useful in the intermediate grades (8-10), being suited to the content of textbooks at that level. (IFS/WGA)