In an effort to improve instruction related to psychometrics and psychological testing for beginning psychology majors, an approach was developed at Pennsylvania's Ursinus College that incorporates active, participatory learning and problem solving. The approach is used in a course on research methods and makes use of a networked computer system that includes electronic mail capabilities. The course covers non-experimental research methods in three units: field research, survey research, and correlational research. Instruction in psychometric scaling is provided during the final unit of the course, in which students are asked to design a correlational study that includes several psychometric scales. While students may incorporate existing scales into the study, they are also required to develop their own scales. The use of computer technology and electronic mail helps eliminate much of the time-intensive labor involved in scale development, with students submitting and rating test items electronically. The following steps are used in developing the psychometric scales: (1) the class selects a concept to be scaled; (2) each student submits five potential items for the scale; (3) the item pool is circulated via electronic mail and students rate each item; (4) the instructor prepares a statistical description of the items; and (5) students select the final items. An outline of the steps in preparing a scale is appended. (TGI)