RCIA is the process. The actual class and the make-up of the class is only one part of the process, the catechetical (teaching) portion. As I said, it depends on the parish, the needs of the youth preparing to enter the Church, and the resources of the parish, what class she would be placed in for that component.
RCIA means Rites of Christian Initiation for Adults. That refers to a process of conversion, formation, catechesis and discernment, carried out over distinct periods with specific purposes, punctuated by certain minor rites and assist the process, and ending in the Rites of the actual Sacraments of Initiation – baptism (for those not already baptized), confirmation and first communion.
For instance, in this diocese the normal age for confirming Catholic youth is 16, so high school youth in RCIA prepare with their peers in the Confirmation class, since they are studying essentially the same things. Those in RCIA celebrate the various rites along with children and adults also in RCIA process. The timing of the sacraments also depends on several factors. The normal time for baptism of adults (who are confirmed and make first communion at the same time) is at the Easter Vigil. Those who are already baptized may be received into the Church at Easter, or at another time designated by the bishop or pastor.
again, please talk to your RCIA director and get the info for your own parish and family situation.
PSR means Parish School of Religion, and the same person in charge of that (religious instruction for Catholic children and youth, including sacramental preparation) may or may not also direct the RCIA process.