Thus, students are confronted only with the minimum material necessary to a basic understanding of the subject. This does not reduce available text nor does it appreciably increase the teacher's burden. They are forced to skip portions or stop before the end. Either way study is incomplete. Textbooks are written to flow chapter by chapter without interruption or omission.
Continuity is necessary to their application.
When chapters or even small portions are omitted, continuity is often lost and study becomes fragmented. To maintain continuity teachers commonly adjust study to fit slower learners. This diminishes the amount of material covered and handicaps more apt learners. Newspapers are not structured like textbooks Articles are naturally topical and deal with events and people complete in and of themselves. History is presented logically and orderly.