The question of what happens when a prison adds PLATO computer-based education to its school program is addressed in this paper describing the PLATO Corrections Project (PCP), which grew out of a need to accommodate students too advanced for adult basic education classes and not well trained enough to survive in high school equivalency, or GED, classes. The program described was developed to provide a class structure in which such students could learn basic academic skills, study skills, and the self-monitoring skills needed for the GED classes. Basic information is provided on starting a PLATO classroom in a correctional center which identifies what both the PCP and the school will need to do, and a short case history of the implementation of the PCP package at Graham Correctional Center, a medium security prison in Hillsboro, Illinois, shows how the package worked at one institution. The case history includes background information, preparations for and installation of the classroom, training for teachers and inmate aides, classroom routines, monitoring of the program, achievement results, the future of PLATO at Graham, and a brief assessment of the instructional effectiveness and adaptability of the program. A six-item suggested reading list is attached. (LMM)