A diagram may clarify the relations among the raw materials of this course.
Each problem is developed as shown in the diagram for Problem 4. The inventories and a few sample dialogs for Problem 1 are reproduced on pp.333-334. The question, of course, is how to use this mass of material. The Cummings principle was applied to the initial presentation of the production inventory. The first half of the treatment of Problem 1 is reproduced on pp. 335-336. It is apparent that the activities labelled 'pronunciation' and 'meaning' in this lesson plan correspond more or less to the M-phase of a Cummings device, and that 'use' and 'cumulation' are in some sense a C-phase. It is also easy to see how Cummings devices could be derived from the materials as they stand. This superficial correspondence is however not the point. What is important is that the student meets a very small amount of new material, manipulates it, and then uses it.
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