Totus Tuus is a summer catechetical program staffed by college aged students from across the United States who share the Gospel and promote the Catholic faith through evangelization, catechesis, Christian witness and Eucharistic worship. This week-long parish summer program assists parents and parishes in the evangelizing and catechizing of their youth.

Parish catechists are grouped into teams of four, each consisting of two men and two women, and are invited to a different parish every week for seven weeks, where they teach and inspire the youth of the parish.