The paper presents and analyses a sequence of events that preceded an insight solution to a challenging problem in the context of numerical sequences. A three­week long solution process by a pair of ninth­-grade students is analysed by means of the theory of shifts of attention. The goal for this article is to reveal the potential of this theory…

To increase the efficacy of visual instruction, more must be known about the operational forces within the image, and the determining factors in picture quality as a means of communication. The theory of information applied to this analysis of pictorial content, the fundamental thesis being that the value of an image depends on its content of…

This manual describes 18 music-based activities and suggested variations designed for classroom teachers (with little or no musical training) to teach profoundly disabled students more consistent and advanced levels of responding to their environment. Brief suggestions are presented for teacher behaviors, structure of turn-taking, and classroom…