Suggests a practical approach for coping with training students in laboratory skill through the use of videotaped (VTR) materials and discusses the technical advantages of using VTR as opposed to laboratory research. Six references are provided. (MER)

Effectiveness of two versions of computer software used as an electronic blackboard to present geometric concepts to ninth grade students was compared. The experimental version incorporated color, animation, and nonverbal sounds as stimuli; the no-stimulus version was monochrome. Both immediate and delayed learning were significantly better for…