Nativity Fellows are full-time members of the Nativity staff. They teach an average of 2-4 class periods per day while serving as advisors, tutors, proctors, coaches, nurses, janitors, drivers, monitors and all other responsibilities that promote the success of the students’ well-being.

Casa Maria is the community house where fellows serving in Worcester's Nativity School reside.  Life in Casa Maria is an opportunity to form community and to engage in the tough work of sharing responsibility with each other for the myriad details which make life together possible and worth the effort. It is also a unique opportunity to engage in “simple living. ”Simple living" offers Nativity Fellows a chance to “feel” what life on a tight budget means, particularly as the overwhelming majority of Nativity families struggle to make ends meet. The Casa Maria Community attempts to gain a deeper sense of the difficult conditions from which Nativity students come.