The curriculum of St. Mary's Schools is intended to be comprehensive enough to provide educational opportunities for the youth of the O'Neill area. St. Mary's includes in its program a combination of Catholic doctrine, moral motivation, and spiritual experiences that allow the youth the opportunity to develop strong faith and Christian principle.

The curriculum courses include: math, reading, language, handwriting, spelling, religion, social studies, science, music, art, physical education, spanish, library skills, and keyboarding. The Accelerated Reader program is used in grades K-6. The Accelerated Math program is used in grades 3-6.  The Saxon math series is taught in grades K-6. Our staff is also trained in the Step Up to Writing program.