A computer processed sociogram (CPS), using a numberical printout and vectors, is being successfully used by teacher trainees at Lock Haven State College during their student teaching. Mark-sense IBM cards are marked by students and punched by the mark-sense machine; the computer program then analyzes the cards, draws vectors and issues a numerical printout to indicate the social structure of the group. The chief advantage is that the student teacher is spared the tedious task of tabulation, but is provided with information about social relations in the class he teaches. Such information can be used to determine class assignments, promote worthwhile interaction, and improve the overall learning climate. It can also be useful as an indicator of maladjustment, as a group therapy, as a variable in innovative educational programs, and as a determinant of optimum teaching styles. The CPS should also be helpful to psychologists, sociologists, and the military, business, and other groups where interaction is important. (Author/PB)