In this action research, first-graders were challenged to cope with a sequence of modelling tasks involving an analysis of given situations and choices of mathematical tools. In the course of the sequence, they underwent a change in the nature of their problem-solving processes and developed modelling competencies. Moreover, during the task…

A training program designed to teach high school students to be specific in their writing is described in this booklet. The first section of the booklet explains the three stages of the program: (1) daily practice in translating a "telling" sentence into a "showing" paragraph; (2) application of "showing" writing to…

The authors describe an electronically programed learning environment for early education of children with severe developmental retardation which is designed to demonstrate that such children can learn when instructional variables are clearly specified and controlled. Discussed are behavioral characteristics of severaly retarded children (such as…