Philosophy & History

Age Cum Anima Christi
We Act in the Character of Christ

The name of the school, Cantwell-Sacred Heart of Mary, represents two very distinguished educational traditions long associated with the San Gabriel Valley.

Cantwell High School was established in 1946 by Reverend John J. Cantwell, Archbishop of Los Angeles. With great respect for their teaching ability, the Archbishop enlisted the Christian Brothers of Ireland to staff the school. It was through their hard work that Cantwell produced the quality education and exceptional young men for which the school is known.

Sacred Heart of Mary High School for young women was founded in 1942 by the Religious of the Sacred Heart of Mary, an international apostolic institute of religious women. With a tremendous spirit of faith and zeal, this religious congregation established the school as an expression of their mission to make God known and loved.

In July, 1991 these two institutions came together to form Cantwell-Sacred Heart of Mary High School also known as CSHM.


The mission of Cantwell-Sacred Heart of Mary is to instill in our students a lifelong love for learning and to inspire them to act in the character of Christ.
Cantwell-Sacred Heart of Mary is a distinguished Catholic college preparatory high school in the Archdiocese of Los Angeles that empowers students to emerge as faith-filled lifelong learners that create a world of justice, love and peace for the 21st century.


Cantwell-Sacred Heart of Mary, a College Preparatory School owned and operated by the Archdiocese of Los Angeles, provides an educational environment which promotes Gospel values, celebrates diversity, develops self-worth and respect for others, encourages personal responsibility, and challenges students to share their gifts in building a just and peaceful society.

Every aspect of the school program is based on the foundation of To Teach As Jesus Did, bringing Christ and His message into the educational experience, collaborating with parents as the primary educators to develop “young men and women of character.”

The school provides an atmosphere of learning which develops an awareness of self-worth, respect and responsibility toward others, thereby fostering an appreciation of cultural and ethnic diversity. All students are challenged to utilize their unique gifts to promote the common good and the glory of God.

Cantwell-Sacred Heart of Mary High School offers curricular and co-curricular activities providing all students with opportunities to pursue their interests in a supportive learning environment. The curriculum prepares students to accept future educational and career challenges. The co-curricular program encourages students to develop mental and physical skills, a healthy competitive spirit, teamwork, and self-discipline.

Cantwell-Sacred Heart of Mary High School practices its philosophy in the realm of the acclaimed school's Integral Student Outcomes (ISO's, outlined below.)



Cantwell-Sacred Heart of Mary graduates are young women and men of...

Practice the teachings and tenets of the Catholic faith
Embrace the dignity of life by accepting others with love, respect, and mercy
Commit to a relationship with God and empathy for others through a life of service
Celebrate personal heritage, respect cultural diversity, and recognize the value of collaboration
Live a healthy lifestyle that nurtures the mind, body, and soul
Maintain stewardship of the environment
Affect intellectual curiosity, creativity, critical thinking, problem solving, and academic integrity
Communicate effectively, develop proficiency in research, organization, technology, and the arts.