From the earliest stages of elementary school to the advanced college level, vari- ous types of illustrations are included in educational materials in order to pro- mote learning. These illustrative adjuncts are often profuse and, in many cases, they may be the most striking feature that distinguishes one set of learning materials from another. In addition, the perceived effectiveness of the illustra- tions clearly plays an important role in the marketing of many educational materials. Despite this pervasiveness and salience in education, there has never been a systematic effort to bring...

From the earliest stages of elementary school to the advanced college level, vari ous types of illustrations are included in educational materials in order to pro mote learning. These illustrative adjuncts are often profuse and, in many cases, they may be the most striking feature that distinguishes one set of learning materials from another. In addition, the perceived effectiveness of the illustra tions clearly plays an important role in the marketing of many educational materials. Despite this pervasiveness and salience in education, there has never been a systematic effort to bring...