When it is impractical to provide behavior analysis students with exte
nsive laboratory experience using real organisms, computers can provid
e effective demonstrations, simulations, and experiments. Furthermore,
such computer programs can establish contingency-shaped behavior even
in lecture classes, which usually are limited to establishing rule-go
verned behavior. We describe the development of computerized shaping s
imulations and the development of software that teaches students to di
scriminate among reinforcement schedules on the basis of cumulative re
cords.