Discusses research on representational pictures, which share physical resemblance with the concept the picture represents; analogical pictures, which convey a concept; and arbitrary pictures, or highly schematized visuals related logically to the things they represent. The contributions of each type to adult conceptual learning and learning from…

Describes Pathfinder, a microcomputer software package designed to improve students' understanding and skills in interpreting graphs of physical phenomena which was tested in high school math classes. Differences in strategies between various ability levels are reported, and student interactions based on observations and interviews are discussed.…